[02:44:27] stephaniebush leaves the room [04:48:14] kaseycantwell leaves the room [09:55:57] EX1806_DIVE14 ROV powered off [11:36:09] Predive Test [11:51:51] EX1806_DIVE15 ROV powered off [12:06:57] good morning everyone we are just about to start launch [12:19:22] EX1806_DIVE15 ROV Launch [12:24:45] conditions are good today, so we are on our primary site along the north, south facing wall in Keller canyon [12:26:38] EX1806_DIVE15 ROV on Surface [12:26:56] EX1806_DIVE15 ROV Descending [12:28:43] LAT : 35.555424 , LON : -74.795279 , DEPTH : 32.5874 m, TEMP : 18.94092 C, SAL : 35.84967 PSU, DO : 5.92816 mg/l [12:33:43] LAT : 35.554581 , LON : -74.795716 , DEPTH : 104.4711 m, TEMP : 13.01985 C, SAL : 35.393 PSU, DO : 6.15713 mg/l [12:38:44] LAT : 35.554059 , LON : -74.796696 , DEPTH : 247.1419 m, TEMP : 11.27357 C, SAL : 35.424 PSU, DO : 4.17562 mg/l [12:43:44] LAT : 35.553818 , LON : -74.797117 , DEPTH : 394.5434 m, TEMP : 7.6615 C, SAL : 35.09985 PSU, DO : 4.94181 mg/l [12:48:45] LAT : 35.553664 , LON : -74.797247 , DEPTH : 546.351 m, TEMP : 5.5875 C, SAL : 35.03862 PSU, DO : 6.81357 mg/l [12:50:22] Good morning. I'm not on the call this morning, but I"m here on chat. [12:53:00] hi Tara! [12:53:30] Hi Leslie! [12:53:45] LAT : 35.55352 , LON : -74.797157 , DEPTH : 608.6579 m, TEMP : 5.31234 C, SAL : 35.0256 PSU, DO : 7.05132 mg/l [12:58:46] LAT : 35.553448 , LON : -74.796601 , DEPTH : 608.6251 m, TEMP : 5.33534 C, SAL : 35.02562 PSU, DO : 7.03902 mg/l [13:00:41] RotjanLab leaves the room [13:01:21] FYI- About 23 minutes until we reach the bottom [13:03:46] LAT : 35.553447 , LON : -74.796144 , DEPTH : 608.4803 m, TEMP : 5.31719 C, SAL : 35.02645 PSU, DO : 7.04646 mg/l [13:06:03] alanleonardi leaves the room [13:08:47] LAT : 35.553435 , LON : -74.795646 , DEPTH : 608.4416 m, TEMP : 5.29747 C, SAL : 35.02532 PSU, DO : 7.07413 mg/l [13:12:04] danielwagner leaves the room [13:13:47] LAT : 35.553459 , LON : -74.795121 , DEPTH : 608.5455 m, TEMP : 5.30728 C, SAL : 35.02586 PSU, DO : 7.06507 mg/l [13:18:48] LAT : 35.553448 , LON : -74.794603 , DEPTH : 608.4641 m, TEMP : 5.30599 C, SAL : 35.02622 PSU, DO : 7.07413 mg/l [13:19:33] jasonchaytor leaves the room [13:23:48] LAT : 35.553447 , LON : -74.794514 , DEPTH : 649.6728 m, TEMP : 5.22356 C, SAL : 35.02238 PSU, DO : 7.13746 mg/l [13:25:45] lots of particulate material in the water column [13:26:24] and no squid so far! [13:26:59] that's sad. [13:27:17] sorry, Mike. Maybe later... [13:27:49] rolling fish heads gave us a good show yesterday! [13:28:49] LAT : 35.55352 , LON : -74.793843 , DEPTH : 726.6269 m, TEMP : 5.10851 C, SAL : 35.01478 PSU, DO : 7.2227 mg/l [13:32:07] those heads were crazy [13:32:38] or creapy... [13:33:27] Sergestids, but not as many as yesterday. [13:33:49] LAT : 35.553515 , LON : -74.793915 , DEPTH : 726.6351 m, TEMP : 5.09862 C, SAL : 35.01589 PSU, DO : 7.23804 mg/l [13:34:14] so i couldn't listen in yesterday, were the heads due to the squid or something else? [13:34:20] Hello everyone, and thanks for joining us today. to update you, we have chosen a slightly different dive route, as the currents are allowing us to go to a south-facing wall. Hopefully we'll see some different habitats that are facing into the current. All other canyon dives have been either at ridge crests or on the north-facing (lee side) walls. Also, we are starting at the base of the wall, so we will get to see a canyon floor briefly before we climb. [13:36:20] @amanda When we did EK80 surveys here last Aug/Sept, we had the thickest bioscatter concentrations I've personally ever seen in Keller Canyon....Very cool to see all this stuff now [13:36:34] ervangarrison leaves the room [13:36:35] @amanda - we are pretty sure the squid bit the heads off and kept the bodies. LOTS of them! [13:37:05] snipe eel [13:37:15] @carolyn-amazing amount of particulate material-wonder if it is a persistent layer or waxes and wanes, like it can in the other canyons [13:38:31] @leslie, it is a great spot just west of where we (Martha) did a sentry dive last year. it was a tricky spot, but really interesting terrain, so I'm excited what we see today! [13:38:50] LAT : 35.553456 , LON : -74.794483 , DEPTH : 710.0022 m, TEMP : 5.15426 C, SAL : 35.01968 PSU, DO : 7.18979 mg/l [13:39:10] @amanda - I'm excited too, and hope we'll find something different! [13:39:12] ervangarrison leaves the room: Replaced by new connection [13:39:19] @amanda--i can send you some of the images from last year's cruise here....on the EK80 with normal settings with just the one 38 kHz transducer the bioscatters filled the canyon's water column almost completely [13:40:50] @carolyn, wow! wonder what processes are causing that material to stay in suspension, whether up canyon currents or down slope transport or both, or .... [13:43:50] LAT : 35.55352 , LON : -74.793963 , DEPTH : 722.4706 m, TEMP : 5.12142 C, SAL : 35.01712 PSU, DO : 7.20858 mg/l [13:44:40] Would anyone be able to let me know what kind of demosponges we have seen this expedition? I'm seeing what kind of specimens we have in our collection to take to the museum today. [13:45:00] the water column transects could be very interesting today based on what we are seeing now [13:46:50] @adrienne-interesting is a good word :) [13:47:19] @all - yesterday's sediment sample, collected in an area with all the small burrows revealed 10-15 worms with retractable body into a compact fleshy hood. We might have found the critter responsible for the small holes. We took pictures, if anyone wants to take a look. [13:47:35] very cool leslie [13:48:04] @leslie-me me me :) [13:48:16] please [13:48:25] @Megan: you should have access to the cruise data site (sent to you with collaboration tools information email). On that site underEX1806 you will find a folder called "Samples" that will have images of all the samples collected on each dive. That would be your best way to determine exactly what sponges have been collected. I can send you addiitonal info by email if you want. [13:48:43] michaelvecchione leaves the room [13:48:50] LAT : 35.553629 , LON : -74.793651 , DEPTH : 722.4281 m, TEMP : 5.10916 C, SAL : 35.01785 PSU, DO : 7.22122 mg/l [13:49:08] :) I thought I'd find someone! I'll ask Stephanie to email to all. [13:49:29] thx leslie [13:50:00] FYI vehicles having trouble seeing each other due to turbidity, hence holding pattern [13:50:26] @Scott I know I can access images - I'm just looking for an ID or two because I don't remember. I'm finding similar samples in the NCSM collection to show museum visitors. [13:51:25] @Scott I found the Okeanos ID site also, but that seems to be all Pacific species [13:51:58] @megan, we've observed many demosponges that haven't been ID'd or collected too. There is so much work to do on sponges! [13:52:40] @Megan: my concern is there is no sponge expert onboard, so you may be deceived if you rely on those IDs. [13:53:01] Last 2 dives have been sponge-free [13:53:17] @leslie - pictures of the worms would be great for the daily update for yesterday [13:53:33] @Megan: I don't mean the animal guide, I mean actual images from this cruise of the actual collected specimens - both in situ and once they get in the wet lab. [13:53:48] @Leslie: not my sidebar comment. [13:53:59] LAT : 35.553585 , LON : -74.793749 , DEPTH : 722.3086 m, TEMP : 5.14168 C, SAL : 35.0175 PSU, DO : 7.20262 mg/l [13:54:07] *note! [13:54:17] @Cheryl, @Scott I know, it's crazy! Maybe I'll stick with other stuff. Sponges are not well-represented in our collections anyway [13:54:35] kaseycantwell leaves the room [13:55:32] @Scott I know - again, just really looking to show representatives of similar things we've been seeing on Okeanos to the public. We are doing a live interaction at 1pm today. [13:56:51] @Megan: ah, sorry. I misunderstood your intent. [13:57:32] @Scott No worries, I probably should have been more clear [13:58:51] LAT : 35.553515 , LON : -74.794344 , DEPTH : 700.9608 m, TEMP : 5.15075 C, SAL : 35.01843 PSU, DO : 7.1928 mg/l [13:59:27] RotjanLab leaves the room [14:00:04] @sci Might type something in chat room to explain situation for those not listening in? [14:00:26] @Megan: I thought you were looking through the collection for sponges to compare to our collected sponges! [14:01:09] @Amanda - Steph is on it now. she thinks it's an acorn worm. hope you can id it! [14:01:20] going up? [14:02:42] we are ascending until we get out of the no-visibility layer, then, hopefully we can move toward the canyon wall. we will have to save the canyon floor for another day! [14:03:07] Seirios cannot see D2. [14:03:52] LAT : 35.553502 , LON : -74.79448 , DEPTH : 622.4928 m, TEMP : 5.2701 C, SAL : 35.02434 PSU, DO : 7.08463 mg/l [14:04:06] Acron worms are what I thought I saw poking out of some of the holes yesterday. [14:04:42] cant wait to see the images [14:05:42] I'm just reminiscing, if that is the right word, that we had similar vis issues with Jason ROV dives in Norfolk canyon in 2013. we had to readjust and readjust until we were able to find a clear enough spot to progress up the canyon walls [14:06:26] I think Cheryl was saying the same thing (she's stepped away for the moment) [14:07:27] I wonder if a turbidity current has passed through recently, or if this is just normal disturbance/resuspension from downward current flow from canyon walls. [14:08:52] LAT : 35.553488 , LON : -74.794138 , DEPTH : 599.5542 m, TEMP : 5.32952 C, SAL : 35.02719 PSU, DO : 7.04094 mg/l [14:09:17] @leslie, right, it could be something that wanes with time or persistent, we tracked the neph layers with time in baltimore and norfolk canyons and both behaved a little differently [14:10:02] would be hard to determine, just a consideration. [14:10:57] Sure explains why we see such thick sediments on these canyon ridges! [14:13:36] @leslie- definitely. we conducted down canyon and cross canyon CTD casts (with turbidity sensors) throughout the day, and had moorings/landers with ADC/ctds to monitor over longer periods, so definitely requires more time ... but this dive is already very informative, particularly for future dives in Keller [14:13:53] LAT : 35.553512 , LON : -74.794181 , DEPTH : 599.4834 m, TEMP : 5.36258 C, SAL : 35.0288 PSU, DO : 6.9977 mg/l [14:15:06] @amanda - do you remember if the Pisces CTDs from last year showed a extensive turbid layer in the canyon? [14:15:47] I am too lazy to turn around and look at those data myself :-) [14:16:05] nice pics of the sampled acorn worms from yesterday! [14:16:21] @jason- let me check- i don't recall anything beyond yesterday, I'm afraid [14:17:01] no audio. [14:17:42] ervangarrison leaves the room [14:18:53] LAT : 35.553522 , LON : -74.794121 , DEPTH : 549.4288 m, TEMP : 5.54313 C, SAL : 35.03487 PSU, DO : 6.83237 mg/l [14:19:05] @sci @amanda Sent you an image of the bioscatters in water column just up-canyon from here, on south-facing wall, from 31 August 2017 [14:19:11] stephaniebush leaves the room [14:20:29] @carolyn-thanks, def quite a feature [14:20:38] Wow! Might be a busy and exciting mid-water dive today! [14:21:49] @carolyn - great! Thanks! [14:22:34] I see clarity! [14:23:52] danielwagner leaves the room [14:23:53] we are at 544m and have enough visibility, however, we are above the targeted ridge's crest, so we are going to head towards where the ridge intersects this depth. [14:23:55] LAT : 35.553573 , LON : -74.79367 , DEPTH : 544.0208 m, TEMP : 5.61351 C, SAL : 35.04041 PSU, DO : 6.78335 mg/l [14:25:53] thanks for the update, Leslie! [14:26:14] Not much settling going on! particulates are just hanging out! [14:26:42] scottfrance leaves the room [14:28:54] LAT : 35.553744 , LON : -74.793831 , DEPTH : 544.0377 m, TEMP : 5.61828 C, SAL : 35.04035 PSU, DO : 6.77825 mg/l [14:29:17] erikcordes leaves the room [14:33:55] LAT : 35.554112 , LON : -74.793796 , DEPTH : 544.1325 m, TEMP : 5.62134 C, SAL : 35.0405 PSU, DO : 6.77256 mg/l [14:37:22] We are now moving towards the ridge. Estimated at ~~30-35 minutes. They may be able to increase speed if the viz improves. [14:38:55] LAT : 35.554586 , LON : -74.793647 , DEPTH : 543.9799 m, TEMP : 5.64594 C, SAL : 35.04147 PSU, DO : 6.75068 mg/l [14:43:56] LAT : 35.555116 , LON : -74.793488 , DEPTH : 544.1002 m, TEMP : 5.60622 C, SAL : 35.03981 PSU, DO : 6.78212 mg/l [14:48:56] LAT : 35.555682 , LON : -74.79337 , DEPTH : 544.0857 m, TEMP : 5.6461 C, SAL : 35.04235 PSU, DO : 6.72789 mg/l [14:51:51] @bob....just FYI to follow up on yesterday's discussion...we are almost exactly on the methane hydrate stability boundary right now with this P-T combo...just a tiny bit too warm [14:52:29] @bob sorry--too cold [14:53:57] LAT : 35.556181 , LON : -74.793231 , DEPTH : 544.0976 m, TEMP : 5.67776 C, SAL : 35.04264 PSU, DO : 6.70828 mg/l [14:54:05] danielwagner leaves the room [14:57:34] question from the audience: Michelle Brochtrup When you encounter an organism that is irredentist, do you ever turn the ROV lights off to see if it glows? IE the mid water organisms or the tripod fish? Thanks. [14:58:57] LAT : 35.556368 , LON : -74.793194 , DEPTH : 553.344 m, TEMP : 5.62472 C, SAL : 35.04089 PSU, DO : 6.74654 mg/l [15:03:46] EX1806_DIVE15 ROV on Bottom [15:03:57] LAT : 35.556292 , LON : -74.793044 , DEPTH : 578.1751 m, TEMP : 5.49835 C, SAL : 35.03469 PSU, DO : 6.88066 mg/l [15:07:15] @Adrienne: not sure if anyone answered the question... On rare occasions we have turned out the lights to see if we can detect bioluminescence from animals. I have been on one dive where we did this with a coral. But we don't usually like to turn off all the lights during operations! So it is only done in very stable circumstances. Note that irridescence (the rainbow-like lights, for example as seen on ctentophores) is a result of light from the ROV (or other source) striking the organism and being reflected in a specific pattern. So, to see irridescence, you need to have the lights on. [15:08:28] Oh - and I had audio off (inadevertently) there, so perhaps the question was already answered! [15:08:58] LAT : 35.55629 , LON : -74.793075 , DEPTH : 585.6504 m, TEMP : 5.45101 C, SAL : 35.0325 PSU, DO : 6.91524 mg/l [15:09:42] @Adrienne we were also going to ask pilots too after they settled vehicles [15:10:10] Hello all [15:10:45] Probably need a special camera system to catch that low light (to us) bioluminescence [15:11:11] danielwagner leaves the room [15:11:29] @Cheryl: yes. Perhaps Tammy can say more about how it is studied. [15:12:06] Good morning. I wanted to let the science team know that today's dive coordinates place the dive precisely within the 'zone of no net current' and very dense suspended marine snow in the water column. This dive repeats a series of JSL dives from the 1990s, results reported in several papers. Most notably: [15:12:16] Sulak, K. J. and S. W. Ross. 1996. Lilliputian bottom fish fauna of the Hatteras middle continental slope. Journal of Fish Biology 49 (Supplement A): 91-113. Abst: “Submersible data from two areas along the Carolina‐Virginia continental slope reveal a Hatteras upper middle slope (HMS) (35.30’N, 74.50’W) demersal fish fauna remarkable for diminutive size of individuals within and across species, a fauna which is accordingly termed ‘Lilliputian’.” [15:12:33] @carolyn..thanks re stability [15:13:30] Soft coral, nephtheid or relative [15:13:51] @Mike V. The suckers are in two's on the Bathypolypus [15:13:54] interesting.. [15:13:59] LAT : 35.556271 , LON : -74.793022 , DEPTH : 584.5354 m, TEMP : 5.40482 C, SAL : 35.02036 PSU, DO : 6.94953 mg/l [15:16:26] The very small zoarcid fishes here are Lycenchelys verrilli [15:17:11] Can't tell from here what that is... Egg mass? Sponge? [15:17:41] Look like squid eggs [15:17:44] Maybe the eggs of the octopus? [15:17:59] same octocoral?? [15:18:42] Correct Leslie - not a true spider. I'm sure that comforts Roland! [15:18:59] LAT : 35.556299 , LON : -74.793004 , DEPTH : 583.7663 m, TEMP : 5.35327 C, SAL : 35.02967 PSU, DO : 6.98152 mg/l [15:20:11] Pycnogonida- very neat. We get some huge ones on the Oculina reefs. [15:22:45] tubes upon tubes [15:22:45] heatherjudkins leaves the room [15:23:59] LAT : 35.556315 , LON : -74.792996 , DEPTH : 583.1932 m, TEMP : 5.32328 C, SAL : 35.02594 PSU, DO : 6.98979 mg/l [15:24:28] Audio note: Cheryl is perfectly clear on the streaming video but quite hard to hear on the telecon line. Leslie sounds great on both. [15:24:31] robertcarney leaves the room [15:27:41] In this peculiar zone of no net current motion and heavy load of suspended matter, the habitat is subject to periods of hypoxia, as per: 1996. Moser, M., S. W. Ross and K. J. Sulak. Metabolic responses to hypoxia of Lycenchelys verrillii (wolf eelpout) and Glyptocephalus cynoglossus (witch flounder): sedentary bottom fishes of the Hatteras/Virginia middle slope. Marine Ecology Progress Series: 144: 57-61. [15:28:13] Looks like Illex to me.... [15:29:00] LAT : 35.556328 , LON : -74.793 , DEPTH : 584.4368 m, TEMP : 5.33884 C, SAL : 35.01881 PSU, DO : 6.99855 mg/l [15:29:48] johnreed leaves the room [15:30:51] squid is Illex illecebrosus [15:31:07] @Ken: interesting. Looks like high O2 right now, and throughout the cruise I haven't seen anything lower than about 3.5 mg/l. But I wonder how that impacts long-term community development. [15:31:57] @ken did you do physiological experiments with the fishes in that paper? We have limited band width so can't look up all that I would want to [15:34:00] LAT : 35.556332 , LON : -74.792992 , DEPTH : 584.4561 m, TEMP : 5.38561 C, SAL : 35.03339 PSU, DO : 6.94616 mg/l [15:35:37] Cheryl - Mary Moser did the physiological research - very nice and convincing work. In our series of 1990s JSL dives here, we found that the sediment is very flocculent and several meters deep. I would be very surprised if you find any rock here - buried under a thick blanket of sediment. Organic content of the sediment here is about the highest ever measured on the East Coast continental slope [15:35:53] stevenauscavitch leaves the room [15:37:46] The Illex may be illecebrosus or I. oxygonius. There's also I. coindetii as all three have been documented in this area [15:38:42] nudibranch? [15:39:01] LAT : 35.556358 , LON : -74.79305 , DEPTH : 584.0536 m, TEMP : 5.42262 C, SAL : 35.03004 PSU, DO : 6.90222 mg/l [15:39:36] Not so sure on nudibranch- now leaning worm [15:40:17] Looks like a nemertean worm to me... [15:42:01] its big compared to the nemerteans I usually get to find in the mud :) [15:42:59] giant [15:43:53] @amanda everything must seem gigantic to you! [15:44:01] LAT : 35.556334 , LON : -74.79309 , DEPTH : 582.5274 m, TEMP : 5.4159 C, SAL : 35.02974 PSU, DO : 6.91191 mg/l [15:46:51] The value of those last images: From a paper describing new species of deep-sea nemerteans from Japan: "Bathyal and abyssal nemerteans collected in dredge or grab samples are usually strongly damaged and incomplete, and, in most cases, these body fragments cannot be identified, which also explains the presence of so many references to ‘nemertean sp.’ in the literature" [15:47:26] i don't know if this is even possible, but that gigantic nemertean might be something new, possible to collect? i know there isn't asuction, but maybe scoop? [15:47:37] such large nemerteans! [15:47:53] as scott wrote, it might be hard to ID without an intact collection... [15:48:07] holy moly [15:48:38] "new species" - i don't know, but maybe [15:49:02] LAT : 35.556346 , LON : -74.793091 , DEPTH : 582.1622 m, TEMP : 5.50345 C, SAL : 35.03052 PSU, DO : 6.86193 mg/l [15:49:19] u need sticky fingers [15:49:41] these big worms could be what formed the paleoburrows we see in the exposed rock layers off New England [15:50:36] good images of the head will help with nemertean ID- or if you can collect, aim for the head [15:50:49] we find them in rocks of many ages Pleistocene through Miocene-ish/Oligocene-ish [15:51:31] brittlestars like these hang out in the mud, waving arms to trap food, but stay subsurface. maybe to avoid being munched [15:51:46] this is crazy, how big is it? [15:52:14] 60m? that is nuts [15:52:18] meganmcculler leaves the room [15:52:24] In Antarctica they can be quite large [15:52:35] THat's the only place I've seen ones that big [15:52:47] To be fair, it did say "reportedly", which means I don't know that it was formally documented. [15:53:03] What is the size on these? [15:53:38] Definitely worth collecting IMO [15:54:00] if you see one in the future and it is scoopable, then that might be worth spending time on trying to collect (if if...) [15:54:05] LAT : 35.556348 , LON : -74.793087 , DEPTH : 582.1425 m, TEMP : 5.47783 C, SAL : 35.03135 PSU, DO : 6.85636 mg/l [15:54:07] jasonchaytor leaves the room [15:54:41] Yeah that's Antarctic size [15:54:56] agree, this is textbook material! [15:55:08] Though they are a bit wider [15:55:58] must be plenty of food for them to grow big and long [15:56:11] The bigger ones are usually parsitic rather than free living as I recall, minus the Antarctic ones [15:56:27] @Amanda: I could see cephalic slits on the side of the head on that long one. Does that help narrow down to class or order? [15:56:47] During our 1990s JSL dives here, we observed large item predation by the abundant Ophiocantha sarsi brittle stars. I noted that one of the buried ones herd curled an arm over the nemertean, but the worm must not be potential food. We observed O. sarsi massing upon resting squids and several species of fishes. But the abundant eelpout L. verrilli is immune to attack. We found the brittlestars and eelpouts lying in contact without predation occurring. Somewhere I have a video of a great ball of O. sarsi massed upon a hapless Illex which tries to swim away and drags the ball of brittle stars up into the water column. But hagfishes emerge and steal the squid from the brittlestars. [15:57:20] The example of the 60m beast is for a free-living taxon (Lineus) [15:57:30] @scott: noticed as well, i am not an expert at Iding them but maybe Amy can weigh in [15:58:03] maybe it will attack the scoop :) [15:58:25] Where do the 60 m free living ones live?! [15:59:03] LAT : 35.556307 , LON : -74.792992 , DEPTH : 581.9127 m, TEMP : 5.36016 C, SAL : 35.02763 PSU, DO : 6.95715 mg/l [15:59:34] I think it was Australia, but not positive my memory is that good. [16:00:26] It is still in there! [16:00:45] crossed fingers and toees [16:01:03] I suspect when you get it up on the ship you will be far less horrified... I suspect it will be somewhat shrivled. [16:01:17] *shriveled [16:01:37] gotta run, be back a little later- thanks for collection! [16:02:01] 1. The largest species of ribbon worm is the bootlace worm, Lineus longissimus, which can be found writhing among rocks in the waters of the North Sea. Not only is it the largest nemertean, but it may also be the longest animal on the planet!Mar 15, 2013 14 Fun Facts about Marine Ribbon Worms | Science | Smithsonian https://www.smithsonianmag.com/.../14-fun-facts-about-marine-ribbon-worms-3156969... [16:02:19] amandademopoulos leaves the room [16:03:37] My brittlestar taxonomy is rusty - should have been Ophiura sarsi, not Ophiocantha [16:04:00] Ha! I was just about to post that! [16:04:13] LAT : 35.556323 , LON : -74.793047 , DEPTH : 581.9719 m, TEMP : 5.30291 C, SAL : 35.0258 PSU, DO : 6.99083 mg/l [16:04:19] The bootlace worm is the commonest nemertean (ribbon worm) found along the coasts of Britain. It can be found on sandy and muddy shores and in tide pools. It lives on the lower shore coiled in writhing knots beneath boulders and on muddy sand. Bootlace Worm - Lineus longissimus - Details - Encyclopedia of Life eol.org/pages/586802/details [16:04:40] More fun facts (admittedly from Wikipedia...): Its mucus contains a relatively strong neurotoxin which it uses as a defense against predators. When handled it produces large amounts of thick mucus with a faint pungent smell, reminisscent of iron or sewage.[4] This toxic mucus has been shown to kill crabs and cockroaches, and could have applications as an agricultural insecticide. [16:04:41] kensulak leaves the room [16:04:59] So... how gets to empty the biobox tonight? [16:05:08] sorry - "who" gets to... [16:05:32] Not it! lol [16:05:49] @Cheryl: you should insist that was a geology sample! :-) [16:06:16] Brilliant Scott! We are sure of that, and bio maybe, so ligit! [16:07:18] haha. I think depending on the nose... [16:07:45] Well, that was fun! [16:08:07] Very nicely done on the collection. [16:09:04] LAT : 35.556348 , LON : -74.792998 , DEPTH : 580.2545 m, TEMP : 5.32123 C, SAL : 35.02575 PSU, DO : 6.9945 mg/l [16:09:41] That was neat. I'm going back to muted watching. I look forward to hearing about how that sample works out :) [16:10:31] Thanks for your input @amy! [16:14:04] LAT : 35.556379 , LON : -74.793013 , DEPTH : 580.1026 m, TEMP : 5.30518 C, SAL : 35.02381 PSU, DO : 6.97736 mg/l [16:14:14] Another Bathypolypus I believe... [16:14:46] Love the perfect pairing of squid and octopus! [16:15:23] And I love the pairing of them with the gastropod! Molluscan diversity. [16:15:56] GReat video, thank you! [16:16:37] Mike - 57 minutes back in the video, there was a cluster of what looked like octopus eggs - attached to a long root-like thing [16:17:46] @ken, mike said he didn't think those were octopus eggs [16:18:42] jamesmurphy leaves the room [16:19:04] LAT : 35.556356 , LON : -74.793028 , DEPTH : 580.3519 m, TEMP : 5.33372 C, SAL : 35.02422 PSU, DO : 6.97593 mg/l [16:19:33] Would be nice to get a close-up of the wolf eelpout. This is a different species from those seen on earlier dives which were Lycenchelys paxillus, not L. verrilli [16:22:30] @Ken: did you observe so many gastropods in your previous work here? [16:22:40] @Ken: I'm surprised at the local abundance. [16:23:40] Thanks. Of the three eelpouts seen on recent dives, Lycodes terranovae sits with its tail tightly coiled in a circle; Lycenchelys paxillus sits with its body in a snaky undulated position; Lycenchelys verrilli sits often with its body and tail nearly straight [16:24:05] LAT : 35.556358 , LON : -74.792965 , DEPTH : 580.0414 m, TEMP : 5.32635 C, SAL : 35.02574 PSU, DO : 6.96841 mg/l [16:28:37] fish with long black whiplike tail is the snipe-eel Nemichthys [16:29:05] LAT : 35.556309 , LON : -74.792983 , DEPTH : 579.3219 m, TEMP : 5.37652 C, SAL : 35.02559 PSU, DO : 6.91912 mg/l [16:30:44] Hi All- in order to reset video feed 2, we would need to take down all three feeds momentarily. [16:31:14] we are going to take them down for just a second, but you should only lose the video for 10-60 seconds [16:31:20] robertcarney leaves the room [16:31:25] Copy that Kasey. [16:31:29] traceysutton leaves the room [16:31:43] Kasey--someone should say something on the audio so that viewers at home know...or is this just the high-res feed? [16:31:54] they've been reset - you shouldl have video back just a second [16:32:09] barely a glitch [16:32:12] @Kasey: thank you for the announcement [16:32:27] can you all see them again? [16:33:01] I didn't see any interuption... [16:33:10] ervangarrison leaves the room [16:33:13] wonderful - thanks all! [16:33:28] These are one of my favorite fish. Crazy looking. [16:33:41] I had few second lost video. [16:34:06] LAT : 35.556371 , LON : -74.792927 , DEPTH : 576.1496 m, TEMP : 5.47573 C, SAL : 35.0258 PSU, DO : 6.8533 mg/l [16:35:55] Anyone know if red coloration is less energetic to produce than black? [16:36:10] This is the imposter Stephanie and Cheryls account [16:37:42] red pigments in fishes are often accumulated from carotenes from prey eaten, so accumulate passively. Melanin, the black pigment, on the other hand needs to be manufactured by the fishes epithelial cells. Bottom line: red is cheaper than black [16:38:38] @Ken: excellent info - thank you. [16:38:55] does that mean crustaceans are smarter than fish? we don't have black crustaceans, just red and orange :). [16:39:06] This looks like a Cyanea, if memory serves... [16:39:10] LAT : 35.556393 , LON : -74.792973 , DEPTH : 574.7085 m, TEMP : 5.48508 C, SAL : 35.03132 PSU, DO : 6.83372 mg/l [16:39:20] @Tammy: Crustaceans are less wasteful. [16:39:36] more frugal... [16:40:30] enriquesalgado leaves the room [16:40:37] heatherjudkins leaves the room [16:40:55] Is seascribe down? [16:41:16] Regarding the armored searobins with extended frontal bones - forming those shovel-like extensions. They are not used for digging for prey, but as a platform to support the fancy sensory barbels. There is a parallel here to the extended snouts of macrourids, sharks, and sturgeons - all extended to provide an undersurface for tactile, gustatory, or electrosensory prey detection. The sea robin mouth is ventral, as in macrouorids, and extends down when projected out to suck in benthic prey [16:41:30] It's working for us in Charleston [16:41:35] bryozoans! [16:41:47] @Tara: I don't think so. Has been working for me. https://divelog.oceannetworks.ca/Dive?diveId=1363 [16:42:38] Watching the feed from the North Carolina Museum of Natural Sciences Daily Planet Theater - which is 3 stories tall! [16:43:02] must be a local problem. It was fine earlier, but now i can't connect. Thanks. [16:43:13] @Megan: Nice! [16:43:24] @Megan: bet you'd love to see a 3-story tall bryozoan in all its glory! [16:44:02] @Scott I just did and it was great! [16:44:12] LAT : 35.556361 , LON : -74.792864 , DEPTH : 568.536 m, TEMP : 5.55692 C, SAL : 35.03392 PSU, DO : 6.75876 mg/l [16:46:00] Back in the period of the 1980s-1990s, the oil companies Mobile and Chevron had an exploratory drill site at about 1000 m depth pretty much right here. They did a lot of subbottom profiling - revealing that this flocculent gray sediment of the middle slope is hundreds of meters thick [16:47:14] This is a tough place to live if you are concerned with cleanliness of the carapace! [16:47:29] tons of eelpouts!? [16:47:52] Same octopus individual we chased off earlier? Or a 3rd one? [16:48:01] @ken 90s? think it was earlier [16:48:26] Seeing many eelpouts, some with brown lateral. spots and others without [16:48:48] I believe it was Bathypolypus [16:49:07] LAT : 35.556425 , LON : -74.792854 , DEPTH : 565.5437 m, TEMP : 5.52681 C, SAL : 35.03521 PSU, DO : 6.80629 mg/l [16:49:47] meganmcculler leaves the room [16:50:49] Agree: feathery hydroid in the foreground [16:54:08] LAT : 35.556501 , LON : -74.792883 , DEPTH : 565.5692 m, TEMP : 5.49394 C, SAL : 35.02969 PSU, DO : 6.85916 mg/l [16:54:46] The oil companies may have held the lease from an earlier date, but my contract work for MMS was conducted in the late 1980s and early 1990s at the time when development was being considered, and the lease resold - cannot remember which company had it last [16:55:16] Thanks...not in my database, and I'm heavily working this margin over the past 4 years, including a major program this summer. [16:56:08] @ken The Chirp we have over this ridge from 2016 was not usable...from Armstrong shakedown in 2016. Looked it over last night. [16:57:11] This site, in the dead current zone behind the conjunction of the western boundary undercurrent and the Gulf Stream has the highest organic productivity and organic Carbon content in the sediment anywhere along the U.S. East Coast slope - so not surprising to find the substrate so populated [16:58:31] The rate of organic sedimentation of particles to the bottom here is colossal. Several papers out there in this regard [16:59:05] question from the audience: Karen Mazur Breitenbach On average, how much distance is there between the ROV and Seirios? [16:59:13] LAT : 35.556512 , LON : -74.792895 , DEPTH : 564.4023 m, TEMP : 5.45773 C, SAL : 35.03177 PSU, DO : 6.8428 mg/l [17:03:13] @Adrienne: they are connected by a 30 meter long tether. [17:03:40] @Adrienne: but I imagine you want the pilots to answer that! [17:03:49] Regarding the question about what midwater fishes are zipping around. Two species of midwater fishes are common here, a hatchetfish relative, Meuller's Pearlside, the intensely silvery Maurilocus meulleri and the lanternfish Ceratoscopelus maderensis. The Pearlside is a drifter - haven't seen one today. The hatchetfish darts erratically for short distances, constantly on the move. That is what I have seen today - bumping into the bottom, then darting away [17:04:01] thanks scott! [17:04:09] LAT : 35.556488 , LON : -74.792881 , DEPTH : 562.0218 m, TEMP : 5.51473 C, SAL : 35.03386 PSU, DO : 6.80373 mg/l [17:04:15] madalynnewman leaves the room [17:05:09] taraluke leaves the room [17:07:46] test [17:08:33] Test worked! [17:09:09] LAT : 35.556547 , LON : -74.792894 , DEPTH : 559.5271 m, TEMP : 5.49008 C, SAL : 35.03033 PSU, DO : 6.81434 mg/l [17:10:23] That eel is the snipe eel Nemichthys. Its jaws curve outward like longnose pliers that have been bent open. Those jaws are covered with bands of tiny teeth that form a Velcro-like surface. Nemichthys specialized in midwater shrimps with long antennae. The Velcro jaws entangle the antennae leading to the demise of the shrimp. If you see a snipe eel when not swimming, it commonly has a large lump at midbody where an ingested shrimp is being digested [17:11:40] Keep it coming @Ken! Great stuff. [17:12:35] Another octopus? [17:14:10] LAT : 35.556616 , LON : -74.792884 , DEPTH : 556.4102 m, TEMP : 5.54844 C, SAL : 35.03562 PSU, DO : 6.77274 mg/l [17:17:16] kaseycantwell leaves the room [17:19:10] LAT : 35.556643 , LON : -74.792924 , DEPTH : 556.2717 m, TEMP : 5.59185 C, SAL : 35.03713 PSU, DO : 6.7231 mg/l [17:19:23] No need to dwell on my account. [17:19:28] Supra-ocular papillae of Bathypolypus? [17:19:32] Just thought a different view would help with ID [17:19:58] @ mike question for the audience - Are there any other octopuses besides the casper octopus that have only 1 row of suckers? [17:21:44] Great stuff! [17:22:22] Yes Kasey. There are quite a few species of octopods with uniserial (1 series) suckers. including some incirrate (normal-looking) octopods and all cirrate (finned or dumbo) octopods. [17:22:36] thanks! [17:24:11] LAT : 35.556603 , LON : -74.792965 , DEPTH : 555.934 m, TEMP : 5.58815 C, SAL : 35.0369 PSU, DO : 6.73408 mg/l [17:24:26] I'm trying to think of an enticing menu entry better than "hagfish"... Slimy Pink Mud Dweller? [17:24:42] There is a murder mystery entitled Polar Star with a very disgusting scene involving hagfish. [17:25:47] Hagfish leather is highly desirable, and accounts for almost all of what is called 'eelskin'. It has anti-magnetic properties and a wallet made of hagfish skin is supposedly a defence against electronic scanners that can read your credit cards. [17:27:19] Another defense: just tell someone your wallet is made form hagfish, and they won't want to touch it. [17:27:30] @Scott Absolutely! [17:28:40] I think these are cerianthid tubes extending from bottom... [17:28:55] @Kasey Yes, they are. They are considered some of the most basal chordates in the class Myxini. [17:28:55] stevenauscavitch leaves the room [17:29:09] thanks [17:29:15] LAT : 35.5567 , LON : -74.792958 , DEPTH : 553.3258 m, TEMP : 5.57887 C, SAL : 35.03643 PSU, DO : 6.73778 mg/l [17:29:19] Wikipedia says "eelpouts are the ray-finned fish family Zoarcidae" [17:29:31] Hagfish normally rest in a burrow with only the head end exposed. When burrowed, the sensory tentacles are flaired out to sense prey, and the single large central nostril is kept fully open. Hagfish can exist almost anerobically while burrowed, with essentiallyzero respiration ongoing. When prey is present, the hagfish emerge and swing into action, massing upon prey [17:29:38] @Kasey The jawless bodyplan and resembles Paleozoic fishes [17:29:47] Zoarcidae [17:29:56] While waiting for Ken to answer, it depends on your definition of "fish". [17:30:34] Hagfishes are the most primitive living fishes, as Nolan has noted the last of one line of Paleozoic fishes. Lampreys are distant relatives, the last of their line as well [17:30:50] what are the white squiggly things on left [17:31:04] are those the oph arms still? [17:31:25] @Cheryl Zoarcidae = eelpouts, Myxinidae = Hagfish [17:31:40] I believe so @amanda [17:31:47] New fish left of lasers? [17:32:08] Laying on seds. [17:32:40] Oops, forgot I have a delay [17:33:06] small fathead fish to the left of lasers is Cottunculus, a scorpaeiform fish, mimicing the life style of an angler - sit and wait ambush predator [17:33:58] did you all see a few years back when a truck containing hagfish caused a multi-car pileup in OR. All the hagfish and slime went spilling onto the road... [17:34:02] kensulak leaves the room [17:34:13] @Ken Thank you! I wasn't sure it was a fish or just mud! Good camouflage [17:34:25] LAT : 35.556736 , LON : -74.792992 , DEPTH : 551.3053 m, TEMP : 5.55467 C, SAL : 35.03556 PSU, DO : 6.75357 mg/l [17:34:36] @andrea - i remember that, there was some nice video [17:34:53] amanda or andrea ….;0 [17:35:22] kensulak leaves the room [17:35:42] totes andrea- first time that has ever happened, not [17:36:05] My apologies! [17:36:40] oh leslie, it happens a lot [17:36:52] no worries [17:38:07] anyone on here would like to weigh in on what your background is? feel free to private chat to me an we can share with folks (or you can call in and tell us yourself [17:38:16] :-) [17:39:12] LAT : 35.556787 , LON : -74.793043 , DEPTH : 549.5551 m, TEMP : 5.58289 C, SAL : 35.03585 PSU, DO : 6.71985 mg/l [17:39:29] The hagfish 'slime' or 'mucus' is actually neither. Not the typical fish mucopolysaccharide. Hagfish have millions of 'thread cells' under the skin. Each is a spindle with a thread tightly wound inside, each thread up to 10 meters long. When disturbed, the hagfish expels the thread cells through pores along the sides of the body, the threads unwind and form the substance that entangles everything. [17:39:56] @ken Do they then regenerate the threads? [17:40:12] @Ken: sounds a lot like cnidarian spirocysts! [17:40:44] @Kasey I got my BS in Marine Biology, graduated last year. While I was in undergrad, I did quite a few internships which got me connected with the Okeanos Explorer. I'm getting ready for graduate school to do a PhD. So you too can start very young! [17:42:53] I suppose that the hagfish proliferates new thread cells continuously. There are a grand total of two papers on this topic. But now bioengineers are very interested in the unwinding potential. If you hit a cup of hagfish 'mucus' with a stream of water from a hose, the substance will continue to expand almost endlessly. I once tried to use a pressure hose to clean the mucus off a hagfish, and ended up with a much much larger mess [17:44:13] LAT : 35.556884 , LON : -74.793048 , DEPTH : 549.1759 m, TEMP : 5.54587 C, SAL : 35.03603 PSU, DO : 6.73476 mg/l [17:44:31] @Ken: I once had several hagfish quickly fill a 5 gal bucket with mucus, much to my chagrin. I had to spend the next 5 hours in the lab picking amphipods out of the mucus! [17:47:33] If this dive ascends another 150 m or so, you will encounter a dramatic transition zone about 10-15 m thick where the near-zero current zone meets the bottom of the Gulf Stream. Over that short altitude difference, the bottom current goes from near zero to 2-3 knots. Right below that transition zone, there are often great clusters of brittle stars and eelpouts atop the crest of those soft sediment ridges we have seen today. Time for me to go now [17:47:48] @Sci After seeing that jelly again, I thought I recognized it. Looking at the feeding tentacles, it is definitely in the Semaeostomeae order of Cnidarians; a notable example is the common Moon jelly. These are different from the Rhizostomae; a notable example of which is the Atlantic Cannonball jelly. So the two Semaeostomeae that we saw looked to me a lot like smaller versions of Cyanea capillata, the enormous Lion's Mane Jellyfish. [17:48:40] @ken Thank you for your input! [17:48:58] @scott= cerianthid? [17:49:14] LAT : 35.556854 , LON : -74.793056 , DEPTH : 547.9339 m, TEMP : 5.56041 C, SAL : 35.03519 PSU, DO : 6.72583 mg/l [17:49:37] kensulak leaves the room [17:50:24] @Cheryl Can't tell. If it has inner ring of tentacles, they are too closed up. [17:50:39] @zach - any traffic today in the Viz Lab? [17:51:05] Could it be similar to the Relicanthus? [17:52:33] Best guess: Actiniaria, perhaps family Edwardsiidae [17:54:13] LAT : 35.556852 , LON : -74.79306 , DEPTH : 547.5196 m, TEMP : 5.57388 C, SAL : 35.03716 PSU, DO : 6.6998 mg/l [17:54:28] Here is an example image of an Edwardsiid: https://www.poppe-images.com/?t=17&photoid=950225 [17:54:44] johnreed leaves the room [17:54:57] heatherjudkins leaves the room [17:55:40] Another one: http://actiniaria.com/edwardsia_inachi.php [17:55:57] @Scott They are kind of weird looking...Cool! [17:56:25] @Scott I saw some images of them out of the sediment [17:57:37] So nice to hear Art on the air! [17:59:14] LAT : 35.556829 , LON : -74.793117 , DEPTH : 546.3721 m, TEMP : 5.7564 C, SAL : 35.04604 PSU, DO : 6.54178 mg/l [17:59:34] It took some poking but agreed! [18:01:33] It is like climbing a Saharan dune! [18:02:16] question from the audience: Colleen John: How many invasive species have you come across on this exploration and is there anything being done to limit the results they are causing on east coast [18:04:15] LAT : 35.556978 , LON : -74.793107 , DEPTH : 543.3007 m, TEMP : 5.79475 C, SAL : 35.04689 PSU, DO : 6.52849 mg/l [18:05:41] @Adrienne: I'm not sure we could answer that for the invertebrates as we don't know enough about historical distributions and precise species we are now seeing. By "invasive" I suspect is meant an introduced species that establishes and spreads quickly. .. [18:06:27] I suppose introduced species could be introduced on ballast rocks or something, but that would typically be a problem for shallow water fauna, not deep-sea fauna. [18:07:45] Plus the ballast rocks wouldn't be initially "harvested" from deep water... [18:08:01] or the ballast water [18:08:42] alanleonardi leaves the room [18:08:47] ervangarrison leaves the room [18:09:15] LAT : 35.557025 , LON : -74.793193 , DEPTH : 541.5931 m, TEMP : 5.80565 C, SAL : 35.04589 PSU, DO : 6.52071 mg/l [18:09:26] I suppose if larval stages of deep-sea animals are developing in shallow water, it is theoretically possible to pick some up in ballast water and transport them... But they'd need to be able to survive that trip. [18:09:36] chat-admin leaves the room: Replaced by new connection [18:10:33] meganmcculler leaves the room [18:13:10] As Scott mentioned Invasive species are more of a problem in shallower waters. Many invasive species are found in SE USA and Gulf of Mexico on shallow and mesophotic reefs. One of the worst invasives now is the lionfish. On our surveys of the shelf edge marine protected areas off SE USA (Florida to North Carolina) we are seeing thousands of lionfish at depths of 50 m to 200 m. [18:14:15] LAT : 35.557066 , LON : -74.793186 , DEPTH : 540.1854 m, TEMP : 5.81121 C, SAL : 35.04683 PSU, DO : 6.51002 mg/l [18:15:45] jillbourque leaves the room [18:16:30] stephaniebush leaves the room [18:17:56] this looks different then Duva [18:18:14] @Andrea: thanks. My thought as well. [18:18:31] no…sample it [18:18:55] Wonder if it could be a Scleronephthya or Chironephthya. I can't recall which of those genera are known from out here. Will have to check Deichmann. [18:19:04] just tuned i. Agree with @Scott to sample. Note it has a lot of eggs in the polyps so that will be interesting as well. [18:19:18] LAT : 35.557061 , LON : -74.793183 , DEPTH : 540.295 m, TEMP : 5.82666 C, SAL : 35.04474 PSU, DO : 6.51557 mg/l [18:20:03] We're setting up to sample. Great to see the eggs/gametes so well! [18:21:30] Didn't really see much in the way of sclerites visible, which would likely rule out Scleronephthya [18:21:56] @Leslie Earlier one of the ROV team thought they could have been fish scales from that long thin shiny silver fish. [18:22:16] @Scott, was just reading your answer re invasives. All good of course. But you might mention that there are lots of records of corals in the museums at Yale and Harvard, as well as SI. [18:22:22] johnreed leaves the room [18:22:36] So we know a moderate amount about early coral distributions. [18:22:57] Well, not early, but historical [18:24:16] LAT : 35.557082 , LON : -74.793149 , DEPTH : 540.4034 m, TEMP : 5.79753 C, SAL : 35.04548 PSU, DO : 6.48233 mg/l [18:24:26] Another possiblity from Deichmann is Eunephthya [18:25:07] @Les: yes, good point to make. I'm still not sure I would know if I saw an invasive though... [18:26:24] Agree @Scott... [18:27:49] cathy says it doesn't look like a neptheid [18:28:20] and is not sure what it is, but says most closely resembles an eleutherobia [18:28:33] so good collection! [18:28:43] @Andrea: well that would explain why we can't place it! [18:29:04] @Andrea: I thought we saw one of those a dive or two ago but weren't in posiiton to collect, so glad that this could be one. [18:29:17] LAT : 35.55707 , LON : -74.793178 , DEPTH : 540.4104 m, TEMP : 5.80025 C, SAL : 35.0455 PSU, DO : 6.48219 mg/l [18:29:58] dont call it a good collection until its in the box :) [18:30:34] Right @erik! Considering there have been at least 4 genera listed as possibilities, a good collection! [18:34:17] LAT : 35.557075 , LON : -74.793237 , DEPTH : 540.5649 m, TEMP : 5.80929 C, SAL : 35.04513 PSU, DO : 6.50518 mg/l [18:34:59] @Erik has seen too many floaters in his day... [18:34:59] carolynruppel leaves the room [18:36:11] That squid was acting strangely. [18:36:54] franktamara leaves the room [18:37:57]