[02:29:24] andrewobrien leaves the room [02:29:28] chat-admin leaves the room [02:45:01] kaseycantwell leaves the room [02:46:49] okexnav leaves the room [10:51:46] jimmasterson leaves the room [12:50:22] alanleonardi leaves the room [13:48:10] Hi All - it looks like we will be on site around 11:00. We will assess conditions and hope to be in the water sometime between 12 and 12:30. We will be sending around updated information shortly via email [15:26:14] upasanaganguly leaves the room [15:59:46] Hi All - we haven't started pre-dive yet, so launch will liley be closer to 12:30, maybe a little bit later. [16:01:08] chat-admin leaves the room [16:01:36] EX1806 DIVE12 Test message [16:30:46] ervangarrison leaves the room [16:35:22] scottfrance leaves the room [16:38:25] franktamara leaves the room [16:53:08] Hi All - we are moving forward with launch in ~~ 5-10 minutes [17:00:46] For situational awareness today - we have two interactions planned this afternoon which will pull Leslie and Cheryl at times from the science line. Stephanie will be stepping in at those times. She'll be on the science line and will be helping to guide the dive, but please feel free to call into the telecon to help her with the benthic discussions! [17:03:17] adriennecopeland leaves the room [17:05:14] EX1806_DIVE12 ROV Launch [17:05:55] What is the bottom depth we are headed for? [17:07:04] target is at 1270 [17:07:09] lauch is happening right now [17:08:04] So let's plan on chattign for the pre-dive at 13:30 EDT [17:08:49] 13:30 EDT - got it. [17:09:53] Also - we will have ~~ 4 hours on bottom today for everyone's reference [17:13:04] EX1806_DIVE12 ROV on Surface [17:14:09] EX1806_DIVE12 ROV Descending [17:15:58] LAT : 35.097331 , LON : -75.024228 , DEPTH : 29.0771 m, TEMP : 26.52519 C, SAL : 36.21636 PSU, DO : 6.49457 mg/l [17:20:58] LAT : 35.097718 , LON : -75.022817 , DEPTH : 93.6663 m, TEMP : 16.95843 C, SAL : 36.1676 PSU, DO : 4.37714 mg/l [17:25:59] LAT : 35.09803 , LON : -75.021529 , DEPTH : 256.0919 m, TEMP : 10.93433 C, SAL : 35.36322 PSU, DO : 3.93517 mg/l [17:27:57] nickpawlenko leaves the room [17:30:59] LAT : 35.098029 , LON : -75.021149 , DEPTH : 402.9307 m, TEMP : 7.64575 C, SAL : 35.10127 PSU, DO : 4.99896 mg/l [17:32:02] Question for the pilots from the audience: Tyler Kronebusch: Last cruise I had the opportunity to hear about a day as dive super. I'm curious now about what a day looks like for a ROV team member? Another question is does any one feel there is a new technology in its infancy that has great potential for moving this field forward in a large step? (Hopefully not proprietary and allowable to share) I've read about lasers being used for underwater wireless communication but line of site is required. Thank you again for sharing and everything everyone on ship is doing in the name of science and exploration. [17:34:27] ervangarrison leaves the room: Replaced by new connection [17:34:53] rachelbassett leaves the room [17:36:00] LAT : 35.097851 , LON : -75.021618 , DEPTH : 548.2096 m, TEMP : 5.76218 C, SAL : 35.05097 PSU, DO : 6.66739 mg/l [17:36:07] Adrienne we will ask the wuestion to the pilots after the pre-dive info [17:36:21] *question [17:39:36] sounds perfect! [17:41:00] LAT : 35.097826 , LON : -75.021558 , DEPTH : 710.5339 m, TEMP : 5.10375 C, SAL : 35.02151 PSU, DO : 7.22512 mg/l [17:42:30] danielwagner leaves the room [17:46:01] LAT : 35.097657 , LON : -75.021366 , DEPTH : 858.6758 m, TEMP : 4.76232 C, SAL : 35.00127 PSU, DO : 7.56775 mg/l [17:50:23] Re-posting this for ease: Question for the pilots from the audience: Tyler Kronebusch: Last cruise I had the opportunity to hear about a day as dive super. I'm curious now about what a day looks like for a ROV team member? Another question is does any one feel there is a new technology in its infancy that has great potential for moving this field forward in a large step? (Hopefully not proprietary and allowable to share) I've read about lasers being used for underwater wireless communication but line of site is required. Thank you again for sharing and everything everyone on ship is doing in the name of science and exploration. [17:51:01] LAT : 35.097613 , LON : -75.021521 , DEPTH : 1014.2164 m, TEMP : 4.47529 C, SAL : 34.98489 PSU, DO : 7.7953 mg/l [17:51:18] how long it takes to get to the bottom? [17:51:44] stephaniebush leaves the room [17:53:07] not long, about 200 m to go [17:53:47] and 4 hours on the bottom? [17:54:06] @Tina: correct. ≈4 hr bottom time today. [17:54:48] thanks @scott, @megan, Ok, then I will try to catch you from home [17:55:19] tinamolodtsova leaves the room [17:56:02] LAT : 35.09757 , LON : -75.020989 , DEPTH : 1176.3751 m, TEMP : 4.32366 C, SAL : 34.97656 PSU, DO : 7.88937 mg/l [18:00:54] EX1806_DIVE12 ROV on Bottom [18:01:06] LAT : 35.097814 , LON : -75.020437 , DEPTH : 1256.4997 m, TEMP : 4.27177 C, SAL : 34.97241 PSU, DO : 7.91283 mg/l [18:01:16] nasty eels eat squid. [18:01:30] re snynapho- we saw one on the canex cruise with a mid water fish still wiggling in its mouth [18:02:32] @Michael Are there any observations or evidence to suggest that that squids fight back against the eels? [18:04:03] can't wait to see lots of sediment! [18:06:03] LAT : 35.097789 , LON : -75.020272 , DEPTH : 1268.9262 m, TEMP : 4.26093 C, SAL : 34.97202 PSU, DO : 7.91766 mg/l [18:06:36] eel tries to get squid video https://oceanexplorer.noaa.gov/okeanos/explorations/ex1304/dailyupdates/media/0801-eel-fish_video.html [18:11:03] LAT : 35.097856 , LON : -75.020224 , DEPTH : 1267.8939 m, TEMP : 4.26603 C, SAL : 34.97239 PSU, DO : 7.90587 mg/l [18:12:26] @Amanda Thanks! [18:12:42] Gnathophausia is a lophogastrid. [18:12:59] Regarding synaphobranchid eels: They are near-bottom mobile foragers, almost always swimming parallel to the substrate - but occasionally lifting off or hovering. These are among the most active predators in the deep ocean, highly attracted to disturbance. Subs and ROVs qualify and probably what you see is partially due to attraction of synaphos to the light, noise, vibration, and electrical fields generated by an ROV. Typical food of actively foraging synaphos = fishes, shrimps, and squids. Midwater fishes venturing near the bottom are also selected. Synaphos are opportunistic and will also prey on salps, ctenophores, and other low-cal items. And, they are strongly attracted to foodfalls and dead animals. Even rather large items will be attacked, the eel will grasp onto the item and head shake to rip off a piece to ingest. And yes to injury from squids. Synaphos are often scarred with scratches and scrapes and sometimes more significant injuries. [18:13:21] halosaur [18:13:30] @sci: As Mike V. corrected me yesterday, many of what we are calling mysids are actually lophogastrids, including Gnathophausia. [18:13:34] Halosaur [18:13:43] halosaur - Aldrovandia phalacra [18:13:52] Aldrovandia, no scales on the nose [18:14:23] Buit both lophogastrids and mysids are peracarids, so still okay to refer to them in general as opposum shrimps. [18:15:44] Although recent molecular data suggests mysids and lophogastrids are in separate clades... as for "peracarids", well, we won't go there today :D [18:16:00] Macrourid was a large specimen of Nezumia bairdii - good character for ID is the black leading edge of the upright dorsal fin [18:16:09] haha. Sorry Les - didn't mean to touch the 3rd rail... [18:16:17] LAT : 35.097878 , LON : -75.020058 , DEPTH : 1261.2905 m, TEMP : 4.27276 C, SAL : 34.97285 PSU, DO : 7.91147 mg/l [18:16:27] A couple of years ago, OkEx got some direct observations of cutthroat eels preying on squids. [18:16:40] Nematocarcinid shrimp - thread-legged shrimp [18:16:49] @Michael Thanks! [18:17:47] haha @Scott....still laughing... [18:18:24] I am with a group of high school students at Harbor Branch Oceanographic Institute and they are interested in more information about the engineering behind the ROV. Specifically, how it is powered and remains functional throughout the entire duration of the dive. [18:18:53] that's a spectacular tripod fish...different from what we have seen before [18:19:24] Bathypterois viridensis [18:20:50] Thank you! [18:21:04] LAT : 35.097943 , LON : -75.020053 , DEPTH : 1255.3924 m, TEMP : 4.28595 C, SAL : 34.97317 PSU, DO : 7.89596 mg/l [18:23:52] Drifting sideways fish = the Ophidioid Dicrolene intronigra [18:25:56] What I saw looked just like a thin snake moving quickly, and I suspect it was some mucus string caught by prop wash. [18:26:10] LAT : 35.098091 , LON : -75.020304 , DEPTH : 1248.467 m, TEMP : 4.29296 C, SAL : 34.97351 PSU, DO : 7.89402 mg/l [18:26:13] But it was extending from the burrow. [18:28:26] Zoarcid Lycodes terranovae [18:29:35] Nematocarcinus also has expanded "flaps" at the end of the legs, which we have been calling mudboots, to help them walk on the sediment without stirring it up. [18:29:53] @Ken, most of the instances of that zoarcid are with the beast curled up like that. Are they ambush predators? [18:30:17] Fish food? [18:31:00] I was thinking shrimp molt but seems too flexible [18:31:10] what's left of a shrimp after a cutthroat eel gets done with it. [18:31:18] LAT : 35.098165 , LON : -75.020405 , DEPTH : 1244.4028 m, TEMP : 4.31748 C, SAL : 34.97433 PSU, DO : 7.86731 mg/l [18:31:40] Phormosoma urchin [18:31:47] Today's dive is a good counterpoint to the hard substrate habitat that is rich in sponges, corals and other attached epifauna. Few of those are likely fish food - too refractory and difficult to digest. Also, hard substrate is often poorly inhabitated by benthos. Soft sediment, if well provided with fallout from above, is much more ideal habitat for benthos, shrimps, and fishes. [18:34:38] I was hpoing we'd see some Lophelia today so I could say the following (which I am saying anyway!): Deep-sea coral news flash: Lophelia and the Cordes lab (starring Alexis Weinnig) in the New York Times: https://nyti.ms/2IpEb72 [18:35:45] @leslie Do you think the stickiness of the sediment is due more to electrostatic forces like clay particulates or biological stuff? I don't remember if you answered this question yesterday. [18:35:59] Yeah, was a good article. Congrats to Alexis and Eric [18:36:13] LAT : 35.098196 , LON : -75.02053 , DEPTH : 1234.6212 m, TEMP : 4.32689 C, SAL : 34.97528 PSU, DO : 7.86622 mg/l [18:37:32] In those situations where there appear to be multiple anemones on crab, it is often a single zoanthid colony with multiple zooids. [18:37:43] yes, Nolan. clay mineral have slight charges that allow them to be somewhat cohesive. they are also flat sheet-like minerals, and when compressed, water squeezes out and the charges help keep grains together. (did you learn that in my class??) :) [18:38:09] I did not talk about it yesterday, though. Perhaps more on it today. [18:39:03] johnreed leaves the room [18:39:42] there is a crab?under that anemone [18:39:55] @leslie Yes! Yes I did! :-D Thank you! [18:40:36] That "anemone" is a cup coral. You can see the sclerosepta [18:41:06] LAT : 35.098199 , LON : -75.020368 , DEPTH : 1232.5352 m, TEMP : 4.32191 C, SAL : 34.97456 PSU, DO : 7.86571 mg/l [18:41:16] Yeah just noticed that before the camera pulled back [18:41:46] and the crab? was a lithodid? All very strange [18:41:59] Yes, looked like a Neolithodes [18:42:13] Looked lithodid-like to me [18:42:15] or maybe a lithodid molted exoskeleton [18:42:26] @Les: not that I'm an expert on lithodid! [18:43:37] the only way to get rid of a cup coral that has settled on your exoskeleton is to molt [18:43:51] haha [18:44:23] I think this is a pretty common habit for this type of asteroid - mostly buried with tips of arms showing. [18:44:34] But I don't recall what it is called. [18:44:49] Good to know Scott! [18:45:02] I would need to see more of it exposed to be sure, but it could be related to the sand burrying, shallow-water, Luidia. [18:46:07] LAT : 35.098296 , LON : -75.020506 , DEPTH : 1224.2582 m, TEMP : 4.32016 C, SAL : 34.97488 PSU, DO : 7.86257 mg/l [18:47:35] Dicrolene intronigra - benthos feeder equipped with elongate sensory fish ray 'feelers' [18:47:49] As per Chris M.: asteroid is a Paxillosida (Order) [18:48:42] Sorry for typo - should have read 'fin ray' feelers [18:49:49] Paxillosida contains Astropectinidae which also contains the shallow water Luidia [18:50:34] taxonomically, not literally of course! [18:51:07] LAT : 35.098423 , LON : -75.020658 , DEPTH : 1217.1991 m, TEMP : 4.30538 C, SAL : 34.97391 PSU, DO : 7.8743 mg/l [18:52:00] I do think this is another Paxillosidan - you can see the long, pointy tube feet. [18:52:15] michaelvecchione leaves the room [18:52:35] I recall on one dive we saw one almost running ove rthe bottom - remarkable haw fast it was propelled forward on the tube feet. [18:52:50] @Scott Agreed [18:56:07] LAT : 35.098381 , LON : -75.020803 , DEPTH : 1216.1293 m, TEMP : 4.29312 C, SAL : 34.97334 PSU, DO : 7.89275 mg/l [18:57:13] kensulak leaves the room [18:58:22] Another question from the students, regarding the regenerative properties of the starfish, is there a limit to the number of times they can regrow their arms? Does the stress of regeneration significantly shorten their lifespan? [18:59:31] leswatling leaves the room [19:01:08] LAT : 35.098573 , LON : -75.0207 , DEPTH : 1207.1013 m, TEMP : 4.31173 C, SAL : 34.97512 PSU, DO : 7.8758 mg/l [19:01:19] Definitely zoanthoid on this crab [19:02:30] Thank you! [19:02:43] Thanks Scott, thought they were anemones [19:02:51] This is Steph btw on Leslies computer [19:04:52] Not tube, no inner tentacles [19:05:46] aren't golden "corals" zooanthids? They form a hard branch like the branching corals [19:06:06] yes, they are [19:06:17] LAT : 35.098486 , LON : -75.0208 , DEPTH : 1205.9235 m, TEMP : 4.30505 C, SAL : 34.97469 PSU, DO : 7.87945 mg/l [19:06:30] @Tammy: yes. [19:06:44] But as far as I know, they are the only zoanthids that can fomr a hard skeleton, so pretty unusual. [19:07:34] gold coral are interesting because they colonies other coral, usually bamboo coral, awn then lay down a proteinaceous matrix over the host skeleton to create a larger colony with an intricate branching matrix [19:08:45] I like them because they put out a brilliant blue-green bioluminescence [19:09:47] @Frank They are pretty neat organisms! [19:10:00] flabellum [19:10:08] ? [19:10:19] one of may favorite corals :) [19:10:54] i love the visual: taco :) exactly what I was thinking [19:11:05] @Meagan Same! [19:11:17] LAT : 35.098632 , LON : -75.020852 , DEPTH : 1200.1748 m, TEMP : 4.31064 C, SAL : 34.97445 PSU, DO : 7.86897 mg/l [19:12:10] happy Taco Tuesday! [19:12:20] It seems at least some species of zoanthids are able to form a carcinoecium (the replacement for the gastropod shell in hermit crabs) [19:12:42] hello all [19:12:51] @Meagan Yes! That's right! I always seem to forget! [19:13:03] @scott, thats really cool [19:13:07] @Asako Hello! [19:13:17] Hi Nolan! [19:16:09] LAT : 35.098756 , LON : -75.021072 , DEPTH : 1191.0041 m, TEMP : 4.29531 C, SAL : 34.97201 PSU, DO : 7.874 mg/l [19:19:30] Too small for me. [19:21:02] laurenwalling leaves the room [19:21:03] is this the same eelpout? Lycodes [19:21:19] LAT : 35.0988 , LON : -75.020949 , DEPTH : 1186.651 m, TEMP : 4.35954 C, SAL : 34.97657 PSU, DO : 7.83047 mg/l [19:21:22] An uncurled one...? [19:21:35] No sea pens today... but what is growing next to the fish? [19:21:35] ervangarrison leaves the room [19:21:44] Thought it was dead, but its gills are moving [19:23:04] I agree. Different eelpout. Much longer. [19:24:50] johnreed leaves the room [19:25:14] Never a fish person around when you need one. [19:25:42] Fish people are slippery. [19:26:03] Zachproux leaves the room [19:26:10] LAT : 35.098852 , LON : -75.021209 , DEPTH : 1180.9292 m, TEMP : 4.3597 C, SAL : 34.97755 PSU, DO : 7.83522 mg/l [19:26:59] looks like a naticidae - moon snail [19:27:34] @Jill I was thinking same thing. Both Shell shape and the fact that the mantle is covering the shell partway. [19:29:18] Rarely has there been such exciting action on a mud dive... ;-) [19:29:29] Just teasing the mud fans! [19:29:46] @Scott Yes! Except for maybe the crab and brittle star yesterday! [19:30:14] michaelvecchione leaves the room [19:31:11] LAT : 35.098769 , LON : -75.021401 , DEPTH : 1179.5821 m, TEMP : 4.37047 C, SAL : 34.97843 PSU, DO : 7.83758 mg/l [19:32:45] Some sort of echinoderm buried to the top right of this clump [19:33:19] jillbourque leaves the room [19:36:11] LAT : 35.099039 , LON : -75.02116 , DEPTH : 1172.3776 m, TEMP : 4.37063 C, SAL : 34.97837 PSU, DO : 7.82633 mg/l [19:40:21] looks like rust [19:41:12] LAT : 35.099062 , LON : -75.021328 , DEPTH : 1170.9411 m, TEMP : 4.36839 C, SAL : 34.9787 PSU, DO : 7.83006 mg/l [19:44:04] I think thta confirms this is anthropogenic... [19:46:12] LAT : 35.099151 , LON : -75.021266 , DEPTH : 1166.6952 m, TEMP : 4.36079 C, SAL : 34.97825 PSU, DO : 7.84892 mg/l [19:47:36] Collection possibility... [19:48:09] agree with collection [19:49:19] jasonchaytor leaves the room [19:49:42] I just went back and looked at teh squid before teh crab. It was an Illex sitting on the bottom. [19:50:12] At first I thought this was a tpe of Anthoptilum (and maybe it is), but I don't recognize the polyps themselves. Very dense, and the color different from others I have seen. [19:50:46] I have to go now. I'll try to check in via cell from the train but there is no signal during part of the route. [19:50:56] michaelvecchione leaves the room [19:51:13] LAT : 35.099138 , LON : -75.021281 , DEPTH : 1167.9621 m, TEMP : 4.35587 C, SAL : 34.9775 PSU, DO : 7.83303 mg/l [19:51:45] @Stephanie: sample number is 01Bio? [19:52:41] kaseycantwell leaves the room: Replaced by new connection [19:52:59] Excellent collection [19:53:15] Yes, SPEC01BIO [19:54:24] nice collection! [19:56:13] LAT : 35.099155 , LON : -75.021372 , DEPTH : 1164.8679 m, TEMP : 4.36845 C, SAL : 34.97885 PSU, DO : 7.82758 mg/l [19:59:32] crangonid shrimp [19:59:51] That's looks like Glyphocrangon [20:00:05] Glyphocrangon ? [20:01:14] LAT : 35.099197 , LON : -75.021465 , DEPTH : 1161.1406 m, TEMP : 4.37741 C, SAL : 34.9783 PSU, DO : 7.81919 mg/l [20:02:12] Glyphocrangon is still a valid name (WORMS) You never know about names these days. [20:02:58] Thanks for the help there Bob and Tammy! [20:05:11] From Komai (2011): "The caridean shrimp genus Glyphocrangon A. Milne-Edwards, 1881 is currently represented by 87 species worldwide, all of which inhabit continental slopes down to abyssal basins (200–6500m)" [20:05:39] Burrowing...could be. They are pretty common sitting on surface of mud [20:06:14] LAT : 35.099209 , LON : -75.021565 , DEPTH : 1159.5156 m, TEMP : 4.36036 C, SAL : 34.97844 PSU, DO : 7.8292 mg/l [20:06:36] I don't know - I've only ever seen them on the sediment - never close to a burrow. [20:06:51] A really undersampled deep decapod are axiid burrowing shrimp. They generate conical mounds. [20:09:53] agree tubeanemone [20:10:34] no way to collect. [20:11:10] @Tina Welcome! [20:11:25] LAT : 35.099266 , LON : -75.021704 , DEPTH : 1157.6193 m, TEMP : 4.35368 C, SAL : 34.97688 PSU, DO : 7.83521 mg/l [20:11:43] the difeerence of the ptychocysts to all other cnidae is that they are not folded in a spiral, they do not extend when they are inverted [20:11:44] jaylunden leaves the room [20:11:54] hi everybody [20:13:03] Hi Tina. We collected a sample of this sea pen earlier... [20:13:19] Hi Tina! [20:13:48] It is not one I immediately recognize. [20:13:54] elizabethfraser leaves the room [20:15:23] Flabellum? [20:15:52] some - or all Flabellum can swim [20:16:01] @Tina: that is what we are thinking [20:16:13] @Tina: swim or drift? [20:16:18] LAT : 35.099328 , LON : -75.021693 , DEPTH : 1155.5036 m, TEMP : 4.32366 C, SAL : 34.97579 PSU, DO : 7.84831 mg/l [20:17:34] collect? [20:18:46] need better zoom at least [20:18:59] @scott we can't hear you [20:19:11] @Tina: do you think this is Pennatula? [20:19:23] @scott yes, we can hear now [20:20:30] no. [20:20:56] wait [20:21:16] LAT : 35.099263 , LON : -75.021774 , DEPTH : 1154.401 m, TEMP : 4.31649 C, SAL : 34.97547 PSU, DO : 7.86317 mg/l [20:23:37] I would say Virgulariidae [20:23:48] Just a brief scan of figures in Williams (1995), it looks a bit like Scytaliopsis, but I don't know the distribution of that genus so don't hold me to it! [20:24:57] @scott, all from other oceans [20:25:26] @Tina: yup - just read that. And shallower. [20:25:45] I have not seen sclerites [20:26:10] So maybe a deep water Virgularia species [20:26:22] LAT : 35.099448 , LON : -75.021795 , DEPTH : 1150.4572 m, TEMP : 4.32065 C, SAL : 34.97621 PSU, DO : 7.85965 mg/l [20:26:35] at least that family [20:27:17] question from the audience: Colleen John: with no rock structures and soft sediment how are the majority of these fish we are seeing protecting their eggs. do they bury them , set adrift? or travel farther for a more secure structure/cluster of seabed/rock [20:27:53] franktamara leaves the room: Replaced by new connection [20:28:10] rachelbassett leaves the room [20:30:58] Any fish experts in the chat room that might have insights about deep-sea fishes eggs? [20:31:17] LAT : 35.099487 , LON : -75.021965 , DEPTH : 1147.5806 m, TEMP : 4.32393 C, SAL : 34.97636 PSU, DO : 7.85674 mg/l [20:32:02] looks like Flabellum [20:36:17] LAT : 35.099523 , LON : -75.022041 , DEPTH : 1145.5242 m, TEMP : 4.36954 C, SAL : 34.97856 PSU, DO : 7.81766 mg/l [20:37:05] @Leslie Thank you for the review!;-) [20:38:29] Neomorphaster [20:39:18] pilathes [20:39:26] First time we have seen this today. [20:39:56] I'm not a fishy person, but I do teach deep-sea biology, so know that a fair number of them have eggs that drift in the pelagial. Many of them are buoyant, so they drift to the surface and hatch in watersf where there's a lot more food. The juveniles then undergo ontogenetic migrations as they get older. [20:41:17] LAT : 35.099481 , LON : -75.022336 , DEPTH : 1140.8117 m, TEMP : 4.3696 C, SAL : 34.97878 PSU, DO : 7.82432 mg/l [20:43:34] that shrimp is heterocarpus - another crangonic [20:44:53] oops, sorry - Heterocarpus is a Pandalid, but there's probably only 3 people in the world who actually care [20:45:01] haha [20:45:26] True! At least the genus was correct [20:46:18] LAT : 35.099595 , LON : -75.022495 , DEPTH : 1136.4597 m, TEMP : 4.36626 C, SAL : 34.97711 PSU, DO : 7.83283 mg/l [20:48:01] I didn't realize Bathynomus made burrows... [20:48:35] We've seen them scoot into and out of them, but rarely [20:48:47] The biggest Bathynomus known was 18 inches long. I've seen them half buried in the sediment, but also never have seen one in a burrow. [20:49:28] Bathynomus...again commonly seen on the mud or swimming. But there is some video of one or two digging. Either making a burrow or pursuing prey in a burrow [20:51:15] Thanks for that - I didn't know they burrowed. Live and learn! [20:51:28] LAT : 35.099749 , LON : -75.022596 , DEPTH : 1132.3648 m, TEMP : 4.37982 C, SAL : 34.97935 PSU, DO : 7.80497 mg/l [20:53:11] https://www.ncbi.nlm.nih.gov/pubmed/22132782 [20:53:27] I was on a cruise where we deployed a camera sled with a trawl net behind it. After recovering from a deep basin (about 1500 m) we were sorting through the haul and carrying samples back to the wet lab from the fabtail. At one point the captain came back roaring "Who is tracking paint all through my ship!?" It turns out we had trawled up a 5 gal bucket of marine paint, still half full. When we later developed the film (this was back in the days of 35 mm film rolls) we were able to see the drum half buried in mud and read the markings on it clearly - it was navy. [20:55:14] @Cheryl: thanks for that link. [20:55:51] let's not forget about the dumbo squid. [20:56:19] LAT : 35.099813 , LON : -75.022669 , DEPTH : 1131.8125 m, TEMP : 4.3708 C, SAL : 34.98485 PSU, DO : 7.81623 mg/l [20:56:33] I've learned so much over the past few weeks! Love telepresence [20:57:16] study nature! :) [20:58:35] Since the definiton of "bobtail" is "a short tail " I imagine the reference is to the relatively short, squat body compared to an Ilex squid. [20:59:18] Echiura [20:59:28] probostis [20:59:40] flatworm or one type or anothet? [20:59:46] how big is the worm if that's the probosis? [20:59:54] @Scott That might also explain the dumpling name. [21:01:19] LAT : 35.09981 , LON : -75.022987 , DEPTH : 1128.2154 m, TEMP : 4.30166 C, SAL : 34.97513 PSU, DO : 7.85448 mg/l [21:02:20] probosis agree....feed and "pick up" young men [21:02:57] haha Love the "young men" part! [21:03:39] serious cougar worm [21:03:51] haha! I wasn't going to repeat that one! [21:04:38] oh @bob [21:04:46] There is a fantastic "article" from Dr. Tatiana's Sex Advice for All Creation about the spoon worm mating. I read it every year to my Invertebrates class. [21:05:26] How cool! I'll look that book up! [21:05:36] https://www.drtatiana.com/book.shtml [21:05:52] "he Definitive Guide to the Evolutionary Biology of Sex" [21:06:20] LAT : 35.099792 , LON : -75.023122 , DEPTH : 1125.378 m, TEMP : 4.3364 C, SAL : 34.9765 PSU, DO : 7.84974 mg/l [21:10:12] amandademopoulos leaves the room [21:11:20] LAT : 35.09988 , LON : -75.023291 , DEPTH : 1123.8847 m, TEMP : 4.37419 C, SAL : 34.97934 PSU, DO : 7.81381 mg/l [21:11:59] Sounds like it might have some good advice for my deep-sea biol class as well - that's for the reference! [21:12:29] nice feeding shot [21:12:41] it is how these traces appear [21:12:59] It is definitely a fun way to learn [21:13:15] I mean Dr. Tatiana... [21:14:07] now I learned... [21:16:21] LAT : 35.100094 , LON : -75.023295 , DEPTH : 1122.017 m, TEMP : 4.38709 C, SAL : 34.97937 PSU, DO : 7.81065 mg/l [21:18:03] Kophobellemnon or porcupinella [21:19:30] Nice Solasterid [21:21:21] LAT : 35.100068 , LON : -75.023449 , DEPTH : 1121.9526 m, TEMP : 4.31315 C, SAL : 34.97632 PSU, DO : 7.84175 mg/l [21:21:43] There are also swimming sea spiders in the water column that are actually isopods - much smaller than these benthic monsters [21:26:22] LAT : 35.100022 , LON : -75.023526 , DEPTH : 1121.374 m, TEMP : 4.32016 C, SAL : 34.97491 PSU, DO : 7.85859 mg/l [21:30:11] one explanation for the mounds is that large burrowing organisms, like echiurans, make them. as they feed and get fat their bodies push the sediment up into a mound [21:31:17] you might notice a hole next to the mounds where a proboscus might be poking out [21:31:28] LAT : 35.099975 , LON : -75.023804 , DEPTH : 1122.3238 m, TEMP : 4.3527 C, SAL : 34.97742 PSU, DO : 7.82453 mg/l [21:31:40] That would be one fat echiuran! [21:32:10] I don't believe I've every seen an echiuran burrow opening at the top of a mound... [21:32:51] robertcarney leaves the room: Replaced by new connection [21:32:56] But I certainly could see mounds generated by feces generated by deposit feeders. [21:36:23] LAT : 35.100149 , LON : -75.023686 , DEPTH : 1120.8469 m, TEMP : 4.30298 C, SAL : 34.975 PSU, DO : 7.856 mg/l [21:37:05] @Leslie The higher off the sediment, the more current they can get, the more food they can eat. [21:37:46] Interesting that there don't ever seem to be parasites on the tripod fish... Has anyone noticed parasites on them> [21:38:46] @Scott I don't think I have ever seen them either. [21:39:08] Hi Scott- I think we saw one in 2014 in the gulf? [21:40:07] @Kasey: your memory is better than mine! [21:40:45] More like an Ilex-type squid... [21:41:23] LAT : 35.100205 , LON : -75.023627 , DEPTH : 1120.5619 m, TEMP : 4.29706 C, SAL : 34.97608 PSU, DO : 7.86001 mg/l [21:42:25] @scott- I will look for the image [21:43:42] Re sediment...many small rods look like shelled benthic forams [21:43:56] I'm looking at Quattrini-Demopoulos paper tyo see if they make a mention... [21:46:04] No mention of Bathypteroidae in the parasite apper, but that looked at NW Atlantic [21:46:24] LAT : 35.100229 , LON : -75.0237 , DEPTH : 1120.2404 m, TEMP : 4.28962 C, SAL : 34.97424 PSU, DO : 7.86061 mg/l [21:48:10] tinamolodtsova leaves the room [21:49:45] franktamara leaves the room [21:51:24] LAT : 35.100286 , LON : -75.023878 , DEPTH : 1119.5014 m, TEMP : 4.32224 C, SAL : 34.97612 PSU, DO : 7.84068 mg/l [21:51:37] Thank you for the fantastic dive everyone! [21:51:45] nolanbarrett leaves the room [21:52:24] @scott, you are right about the mounds it got it confused, it is fecal build up from echiurans. they extend their proboscus to feed around their burrow and their fecal matter builds up the mound [21:53:13] Thank you very much another nice dive! [21:54:11] Thanks to everyone for joining us today! It's been another fun and informative dive! [21:55:21] EX1806_DIVE12 ROV Ascending [21:56:25] LAT : 35.099916 , LON : -75.024053 , DEPTH : 1097.6973 m, TEMP : 4.45657 C, SAL : 34.9832 PSU, DO : 7.76783 mg/l [21:56:58] meaganputts leaves the room [21:57:05] scottfrance leaves the room [21:57:05] asakomatsumoto leaves the room [22:01:25] LAT : 35.099906 , LON : -75.024106 , DEPTH : 951.0257 m, TEMP : 4.62553 C, SAL : 34.99437 PSU, DO : 7.65672 mg/l [22:06:26] LAT : 35.100042 , LON : -75.023502 , DEPTH : 797.61 m, TEMP : 5.07505 C, SAL : 35.01729 PSU, DO : 7.25778 mg/l [22:10:25] robertcarney leaves the room [22:11:26] LAT : 35.100523 , LON : -75.022755 , DEPTH : 644.1057 m, TEMP : 5.40025 C, SAL : 35.03223 PSU, DO : 6.95202 mg/l [22:16:27] LAT : 35.101138 , LON : -75.021253 , DEPTH : 484.9368 m, TEMP : 6.70782 C, SAL : 35.08323 PSU, DO : 5.81269 mg/l [22:21:26] adriennecopeland leaves the room [22:21:27] LAT : 35.101608 , LON : -75.018975 , DEPTH : 339.9575 m, TEMP : 9.00853 C, SAL : 35.14438 PSU, DO : 4.14069 mg/l [22:26:27] LAT : 35.101957 , LON : -75.01607 , DEPTH : 191.9683 m, TEMP : 14.64854 C, SAL : 35.89577 PSU, DO : 4.29 mg/l [22:31:28] LAT : 35.102143 , LON : -75.013525 , DEPTH : 51.1237 m, TEMP : 21.88278 C, SAL : 36.28688 PSU, DO : 6.31861 mg/l [22:32:55] stephaniebush leaves the room [22:34:54] cherylmorrison leaves the room [22:36:29] LAT : 35.102855 , LON : -75.009295 , DEPTH : 2.7121 m, TEMP : 27.50703 C, SAL : 35.58376 PSU, DO : 6.34622 mg/l [22:39:49] EX1806_DIVE12 ROV on Surface [22:55:41] EX1806_DIVE12 ROV Recovery Complete