[04:01:22] alanleonardi leaves the room [04:51:52] kaseycantwell leaves the room [10:03:37] EX1806_DIVE13 ROV powered off [11:49:44] EX1806_DIVE13 ROV powered off [11:53:29] Good morening everyone- we are on station and preparing for launch. Talk to you all soon! [11:53:46] chat-admin leaves the room [11:54:12] EX1806 DIVE14 Test message [11:57:38] Today is a shallow dive, so we will be on the telcon ad soon as the second vehicle is in the water [12:18:55] EX1806_DIVE14 ROV Launch [12:26:33] EX1806_DIVE14 ROV on Surface [12:27:22] EX1806_DIVE14 ROV Descending [12:29:29] LAT : 35.298678 , LON : -74.949142 , DEPTH : 31.3673 m, TEMP : 15.68826 C, SAL : 34.73911 PSU, DO : 7.15639 mg/l [12:34:29] LAT : 35.298257 , LON : -74.948997 , DEPTH : 103.005 m, TEMP : 14.04043 C, SAL : 35.3845 PSU, DO : 5.66503 mg/l [12:39:30] LAT : 35.29755 , LON : -74.948107 , DEPTH : 259.3962 m, TEMP : 10.70982 C, SAL : 35.35821 PSU, DO : 4.10061 mg/l [12:44:30] LAT : 35.29687 , LON : -74.947331 , DEPTH : 404.2048 m, TEMP : 7.99262 C, SAL : 35.12063 PSU, DO : 4.77891 mg/l [12:45:59] A lot of sergestid shrimps in the water column [12:49:31] LAT : 35.296397 , LON : -74.947186 , DEPTH : 472.987 m, TEMP : 7.06221 C, SAL : 35.09427 PSU, DO : 5.52559 mg/l [12:49:48] The long things could be salp chains, at least some of them. [12:50:25] I think we are also seeing polychaets swimming. [12:50:40] Thanks Mike! Anyone know what the eel-like organisms are? [12:51:28] can you get a snap zoom? [12:52:50] michaelvecchione leaves the room [12:54:31] LAT : 35.296188 , LON : -74.947079 , DEPTH : 497.795 m, TEMP : 6.54726 C, SAL : 35.07705 PSU, DO : 5.96893 mg/l [12:57:03] EX1806_DIVE14 ROV on Bottom [12:58:28] definitely snipe eels. [12:59:32] LAT : 35.296245 , LON : -74.946826 , DEPTH : 509.1136 m, TEMP : 6.35212 C, SAL : 35.06996 PSU, DO : 6.14167 mg/l [13:02:37] robertcarney leaves the room [13:03:45] The very long shiny eels without obvious caudal fin are probably trichiurids. [13:04:32] LAT : 35.296253 , LON : -74.946818 , DEPTH : 509.7015 m, TEMP : 6.39128 C, SAL : 35.07198 PSU, DO : 6.10922 mg/l [13:09:11] The squid could be Brachioteuthis beanii [13:09:33] LAT : 35.296253 , LON : -74.946818 , DEPTH : 509.0109 m, TEMP : 6.48222 C, SAL : 35.09059 PSU, DO : 6.03573 mg/l [13:10:33] Missed the serious squid. Can I get a frame grab? [13:11:18] The type locality for B. beanii is off New England. The Southern Ocean species is not B. beanii. [13:11:27] will see if they got one and send [13:13:07] I am working with Tammy and one of her students on a manuscript on nektonic crustaceans from Bear Seamount. By far, the most abundant shrimp there is Eusergestes arcticus. [13:14:13] We have video (and published on) of summer spawning aggregations of B. beanii off Cape Hatteras. [13:14:33] LAT : 35.29614 , LON : -74.946943 , DEPTH : 503.7266 m, TEMP : 6.49354 C, SAL : 35.07564 PSU, DO : 6.00144 mg/l [13:17:29] sorry, i have the audio muted, are the shiny fish that keep darting around baracudina? we saw those in the northern canyons [13:19:34] LAT : 35.2961 , LON : -74.947022 , DEPTH : 500.9345 m, TEMP : 6.51083 C, SAL : 35.07601 PSU, DO : 5.98739 mg/l [13:19:40] That one is Illex [13:20:14] looks like the sediments (below the surface) are reduced, dark. wow lots of swimmers today! [13:24:34] LAT : 35.296122 , LON : -74.947205 , DEPTH : 499.3518 m, TEMP : 6.4891 C, SAL : 35.07579 PSU, DO : 6.00258 mg/l [13:29:35] LAT : 35.295984 , LON : -74.9472 , DEPTH : 494.2603 m, TEMP : 6.43412 C, SAL : 35.07364 PSU, DO : 6.0592 mg/l [13:34:05] Many krill, probably attracted to the lights so density is artificially elevated. [13:34:32] This was always our experience diving at these depths further north [13:34:36] LAT : 35.295935 , LON : -74.947267 , DEPTH : 490.6867 m, TEMP : 6.33399 C, SAL : 35.07089 PSU, DO : 6.14381 mg/l [13:36:55] @les, yes we've been swarmed before in the canyon dives north of here- had to maneuver away to beat the swarm so we could see [13:37:13] Les, they are sergestids, not krill. [13:38:26] adriennecopeland leaves the room [13:38:30] meganmcculler leaves the room [13:39:35] LAT : 35.295964 , LON : -74.947609 , DEPTH : 483.4971 m, TEMP : 6.30312 C, SAL : 35.06866 PSU, DO : 6.1531 mg/l [13:41:09] Thanks @Mike [13:43:20] Snipe eel teeth are backward pointed, like barbs. Hard to disentangle. [13:44:36] LAT : 35.295827 , LON : -74.947463 , DEPTH : 482.8179 m, TEMP : 6.2345 C, SAL : 35.06573 PSU, DO : 6.22831 mg/l [13:46:03] enriquesalgado leaves the room [13:47:04] those dark lumps of mud (lumpy clay) might have been subsurface-maybe this is a gassy area (or was) [13:49:36] LAT : 35.295684 , LON : -74.947365 , DEPTH : 481.1689 m, TEMP : 6.25817 C, SAL : 35.06694 PSU, DO : 6.1972 mg/l [13:50:40] that looks like Heterocarpus again - usually benthic [13:54:37] LAT : 35.295626 , LON : -74.947518 , DEPTH : 477.9207 m, TEMP : 6.20927 C, SAL : 35.06454 PSU, DO : 6.24551 mg/l [13:59:37] LAT : 35.295541 , LON : -74.947708 , DEPTH : 469.801 m, TEMP : 6.26152 C, SAL : 35.06463 PSU, DO : 6.22461 mg/l [14:00:12] mystery thing in mud...Clueless! Siphon suggests mollusc, but egg-like bumps are hard to explain...collect if another seen. [14:02:50] more evidence of small-scale slope sediment transport [14:03:18] gravity driven or "critter driven" [14:03:40] that might be white mat on the left [14:04:05] subtle downslope ridging [14:04:19] adriennecopeland leaves the room: Replaced by new connection [14:04:38] LAT : 35.295437 , LON : -74.947933 , DEPTH : 466.3608 m, TEMP : 6.28943 C, SAL : 35.06659 PSU, DO : 6.1918 mg/l [14:05:26] bioturbation triggered sediment transport is something we haven't constrained well [14:05:39] might be a snail under all of that [14:05:50] snail [14:06:05] snail [14:06:17] couple snails [14:06:23] 3 [14:07:32] i think there was some black reduced mud with white stuff on the surface, if you zoom out, to the left of this snail action [14:07:40] snail [14:09:21] incipient gully formation, quite subtle [14:09:38] LAT : 35.295436 , LON : -74.948088 , DEPTH : 465.3305 m, TEMP : 6.31118 C, SAL : 35.06765 PSU, DO : 6.18071 mg/l [14:10:10] any idea what species the gastropod might be? Frequently see those shells with hermit crabs. Never have seen the live gastropod! [14:12:22] squat lobster - Munida valida [14:12:33] If we see more snails, we could try to collect. Would probably be a scoop sample due to tiny size [14:12:41] potentially the family buccinidae, possibly genus colus - we've picked those up in trawls from the mid-atlantic canyons [14:13:33] Thanks Jill [14:14:39] LAT : 35.295452 , LON : -74.948066 , DEPTH : 459.0169 m, TEMP : 6.44894 C, SAL : 35.07153 PSU, DO : 6.04355 mg/l [14:15:04] curious that galatheid ran away rather than retreat into burrow [14:16:00] True Bob- anyone know whether these squat lobsters build their own burrows or 'borrow' those created by others? [14:17:49] here we go [14:19:15] Yes! [14:19:25] Good morning [14:19:39] LAT : 35.295446 , LON : -74.94809 , DEPTH : 458.2992 m, TEMP : 6.46323 C, SAL : 35.07639 PSU, DO : 6.01885 mg/l [14:20:11] Hello, Tara! [14:21:35] leswatling leaves the room [14:22:47] sorry, i'm just joining---Derek/Cheryl, this point plots on top of one of the seeps I gave you in our new updated database a few weeks ago...so you expect to see this seep near end of dive? did you re-image overnight? I can pull the actual flare from our dataset if it helps [14:23:34] bivalve...dead, shells at an angle to one another....Nucula, Nuculina ? [14:24:40] LAT : 35.295517 , LON : -74.948255 , DEPTH : 455.2896 m, TEMP : 6.50666 C, SAL : 35.07517 PSU, DO : 5.9907 mg/l [14:25:10] Yes Carolyn, the plume should be between our waypoints 4 and 5 [14:25:20] eel-landslide [14:25:25] adriennecopeland leaves the room: Replaced by new connection [14:25:43] microbial chemosynthesis recognized in 1800's in shallow systems ! [14:26:58] small sediment failure [14:27:25] Hydrothermal vents were not the discovery of chemosynthesis [14:27:46] thanks cheryl....i'm going through our database now to find our image of the plume from our previous cruises [14:28:48] Great- thanks Carolyn! [14:29:40] LAT : 35.294181 , LON : -74.944923 , DEPTH : 450.3257 m, TEMP : 6.92249 C, SAL : 35.07879 PSU, DO : 5.64883 mg/l [14:30:02] franktamara leaves the room [14:30:31] @sci do the bacterial mats we saw earlier grow directly on top of methane seeps or just in the vicinity? [14:31:06] As long as their is enough methane around, it could be either [14:32:10] bact mats typically are sulfide dependent...secondary to methane, oil, mass biomass [14:32:26] < RotjanLab> Good morning everyone! Hope your days are off to a splendid start. My name is Chloe Brown and I am an undergrad in Randi Rotjan's Lab at Boston University. I'm going to be watching for Astrangia today so if you see any give me a shout! :) [14:32:26] irissampaio leaves the room [14:32:51] Cool, thank you both! Does a seep refer to a single hole with bubble plumes or a larger area in which we know there may be several bubble plumes like we are seeing? [14:33:06] Welcome Chloe [14:33:20] right [14:34:24] @ Carolyn - as part of the team that did the original work on the east coast seeps, would you talk a little bit about that and how little we knew about this region as recently as 2010 and how much there is still to learn here? [14:34:41] LAT : 35.295401 , LON : -74.948264 , DEPTH : 447.8225 m, TEMP : 6.5976 C, SAL : 35.07915 PSU, DO : 5.90482 mg/l [14:35:11] Hi Chloe! [14:35:49] "seep" is a useful ambiguous term. bubbles, brine flow, or just black sediment we are probably seeing active and inactive bubble-made holes [14:36:13] frankcantelas leaves the room [14:36:48] @robert thank you [14:39:12] Thank you Carolyn - that was perfect and super helpful for folks at home! [14:39:28] spiffy color contrast in sed [14:39:40] that's my kind of mud [14:39:44] LAT : 35.295295 , LON : -74.948417 , DEPTH : 442.5694 m, TEMP : 6.94466 C, SAL : 35.08969 PSU, DO : 5.61605 mg/l [14:39:58] anyone else having video freezing issues? [14:41:52] @Tara: I have not noticed any video freezes... [14:42:19] @Tara: I'm on I-1, ethernet connection. [14:42:52] @Cheryl: actually, the cerianthid we saw yesterday had striped tentacles... [14:43:09] But I don't think it was thios orange color [14:44:06] Thanks Scott. It's probably just my connection today. [14:44:42] LAT : 35.29521 , LON : -74.948448 , DEPTH : 439.9675 m, TEMP : 6.89795 C, SAL : 35.08947 PSU, DO : 5.63575 mg/l [14:44:59] Oh, didn't remember the stripes yesterday- thanks Scott! [14:46:05] @Cheryl: no worries! Later you can remind me for the 15th time what type of fish we are looking at! :-) [14:47:39] And we saw the striped ones in GoMex. I think they tend to be at the shallower end of the depth range we explore. [14:48:46] amphipod [14:48:58] FANTASTIC! [14:49:04] cerianthids...partial tube excavation seems to be the usual thing on this slope [14:49:42] LAT : 35.295081 , LON : -74.948448 , DEPTH : 434.515 m, TEMP : 7.08575 C, SAL : 35.09239 PSU, DO : 5.48124 mg/l [14:49:57] Nematocysts (stinging) and spirocysts (sticky) in action. [14:50:41] That looks more like a gammarid amphipod than a hyperid amphipod. [14:50:50] Another good example of the importance of benthopelagic coupling at bathyal depths. [14:51:13] I wonder if the presence of the cerianthid tube induces erosion around the tube to enhance the pit... [14:51:50] Gammarids are benthic/epibenthic for the most part, although some of them cruise around several hundred meters of bottom [14:52:24] @Stephanie: you have a better view of it than me. [14:53:17] They're strongly attracted to light, particularly Themisto, which I've usually seen in the water column [14:53:31] I think it was a Themisto-type hyperiid. [14:53:47] I wonder if the amphipod got a coating of mucus in that interaction, and then sediments got stuck on the mucus, making it hard for the amphipod to get away [14:54:16] I defer to Tammy on ID [14:54:43] LAT : 35.295073 , LON : -74.948443 , DEPTH : 434.4544 m, TEMP : 6.63577 C, SAL : 35.07937 PSU, DO : 5.88446 mg/l [14:54:58] we've seen swarms of themisto-type up near the baltimore seeps [14:55:19] and ended up collecting a bunch of them with our sediment cores [14:55:46] Themisto are like cockroaches - we were trying to collect euphausiids in our pelagic samples, and the buckets were packed with Themisto, which, unfortunately, ate the euphausiids [14:55:55] Regarding Stephanie's earlier comment about whether the nematocysts can penetrate the exoskeleton, it is worth remembering that there may be far more spirocycts than nematocysts on the tentacles, and they are more like sticky threads rather than penetrating, so that would be one way to hold onto the prey. Note that is a general comment on cnidria - I don't know the specifics for this cerianthid. [14:56:01] scottharris leaves the room [14:56:24] taraluke leaves the room [14:56:33] @Tammy: I have asimilar story about trying to collect scavenging amphipods in a trap and ending up with a bucket of disgusting hagfish! [14:57:48] heatherjudkins leaves the room [14:58:11] They don't need to penetrate the exoskeleton - the gills are freely available for the stinging cells to hit [14:59:02] @Scott - I hate the disgusting hagfish myself. They always got into my crab and shrimp traps, and killed everything in there with their disgusting mucus [14:59:43] LAT : 35.294976 , LON : -74.948525 , DEPTH : 427.9055 m, TEMP : 6.92995 C, SAL : 35.08812 PSU, DO : 5.69067 mg/l [15:00:41] @Sci note on "seep communities" at this depth and temp you are shallower than Gulf of Mex communities. Bacterial mats, however, have no such depth restriction [15:01:34] irissampaio leaves the room [15:02:47] cool tonguefish [15:03:37] I called the expert to get an id [15:03:56] @martha, i knew you would! :) [15:04:11] irissampaio leaves the room [15:04:44] LAT : 35.29485 , LON : -74.948537 , DEPTH : 421.0904 m, TEMP : 7.10168 C, SAL : 35.09456 PSU, DO : 5.46055 mg/l [15:04:58] Yeah Martha! [15:05:13] @carney Note that there have been seep community discoveries at these water depths (almost exactly this depth) farther north...e.g. Baltimore Canyon seep --NOPP work done a few years back; Nancy Prouty @ USGS was lead on the paper...Alvin subsequently dove there too as part of Van Dover's SeepC and Amanda and I have revisited that site on cruises (including with ROV) since [15:06:19] Amanda would be able to weigh in more about the seep community at this water depth on the Baltimore Canyon promontory...Ecologists always looking to see if what we find here is the same/different as in other places of course [15:06:24] irissampaio leaves the room [15:09:44] LAT : 35.294767 , LON : -74.948723 , DEPTH : 412.7018 m, TEMP : 7.4617 C, SAL : 35.11427 PSU, DO : 5.19101 mg/l [15:11:25] hagfish burrow [15:11:50] @Tammy: don't look! [15:11:58] Bob do they do this often? [15:12:10] ostrich hagfish [15:12:29] as far as I know they spend most of their time this way until responding to stimulus [15:12:48] is this a known behavior?? [15:13:08] weird [15:13:22] Yes, Kasey. They normally burrow. [15:13:38] not familiar with hagfish lit...probably known. [15:13:41] up at the Baltimore seep (similar depth) we've observed mussel beds and bacterial mats, both with higher abundances of infauna associated with them than at deeper seeps (norfolk - 1400-1500m) [15:13:49] thank you Jill [15:14:34] the dive to observe bio behaviour [15:14:47] LAT : 35.294684 , LON : -74.948629 , DEPTH : 411.1614 m, TEMP : 7.62216 C, SAL : 35.11171 PSU, DO : 5.07189 mg/l [15:15:04] @carolyn ...what's the depth for hydrate stability here? [15:16:04] irissampaio leaves the room [15:17:31] The top of the gas hydrate stability limit on this part of the margin is approx 550-575 m. We are already shallower than the updip limit of hydrate stability, so we won't see hydrate on this dive. [15:18:17] irissampaio leaves the room [15:18:47] the bacterial mats are generally characterized by high abundance but low diversity of tolerant taxa due to sulfide concentrations, while mussel sediments have had higher diversity [15:19:45] LAT : 35.294569 , LON : -74.948789 , DEPTH : 398.5581 m, TEMP : 7.83359 C, SAL : 35.11708 PSU, DO : 4.87535 mg/l [15:21:09] scottfrance leaves the room [15:21:22] small hole rims very shaggy [15:21:37] Yes on eye migration. [15:23:22] Thanks, Mike [15:24:45] LAT : 35.294454 , LON : -74.948825 , DEPTH : 393.418 m, TEMP : 7.84318 C, SAL : 35.12163 PSU, DO : 4.8706 mg/l [15:26:49] We saw a hake doing this yesterday... [15:26:58] I mean, burying itself somewhat [15:27:31] michaelvecchione leaves the room [15:27:36] jillbourque leaves the room [15:28:12] michaelvecchione leaves the room [15:28:19] Acorn worm [15:28:31] Enteropneusta [15:28:43] enteropnuse [15:29:33] Deep-sea enteropneusts sit on top of sediment [15:29:46] LAT : 35.294367 , LON : -74.948825 , DEPTH : 391.0055 m, TEMP : 7.90744 C, SAL : 35.11944 PSU, DO : 4.8309 mg/l [15:30:55] stephaniebush leaves the room [15:31:00] nice bubble chimney [15:31:40] ...around old anemone tube [15:31:56] ? [15:32:02] wow [15:32:02] michaelvecchione leaves the room [15:33:50] scottharris leaves the room [15:34:46] LAT : 35.294258 , LON : -74.948849 , DEPTH : 388.2463 m, TEMP : 8.01273 C, SAL : 35.12195 PSU, DO : 4.76175 mg/l [15:39:01] robertcarney leaves the room [15:39:01] I’m on the road today, So this information may have been covered. A 1-cm diameter bubble at 400m, barring any water column loss, would be ~~30cm dis at the surface (please math check! And I am not driving) [15:39:20] *dia [15:39:39] laurenwalling leaves the room [15:39:47] LAT : 35.294188 , LON : -74.949135 , DEPTH : 383.6605 m, TEMP : 8.0213 C, SAL : 35.12178 PSU, DO : 4.71226 mg/l [15:39:55] scottharris leaves the room [15:41:35] That looked like a beroid ctenophore [15:43:55] @carolyn can you get closer to mic? [15:44:47] LAT : 35.294194 , LON : -74.949206 , DEPTH : 381.6673 m, TEMP : 8.10526 C, SAL : 35.12287 PSU, DO : 4.68566 mg/l [15:46:20] @cheryl sorry i'm using Skype on my Ipad, which is on charge not near me...I'll try to do better.. [15:47:35] We heard the last part much better, so whatever you were doing then worked! Thanks! [15:49:48] LAT : 35.294045 , LON : -74.949278 , DEPTH : 378.2612 m, TEMP : 8.09912 C, SAL : 35.12253 PSU, DO : 4.68446 mg/l [15:51:50] I have a tonguefish update from Tom Munroe. The two individuals that we saw are Symphurus marginatus. The first one was uniform in color. It was a female - a ripe ovary could be seen. The second individual was a male. It was about the same size, different coloration, and no ovary was seen [15:54:48] LAT : 35.293959 , LON : -74.949412 , DEPTH : 372.5212 m, TEMP : 8.14384 C, SAL : 35.12412 PSU, DO : 4.6541 mg/l [15:57:56] thanks @martha! we collected symphurus nebulosus at the baltimore seep [15:59:36] S. nebulosus occurs deeper [15:59:49] LAT : 35.293935 , LON : -74.949486 , DEPTH : 370.1688 m, TEMP : 8.20358 C, SAL : 35.12573 PSU, DO : 4.6263 mg/l [16:00:03] RotjanLab leaves the room [16:03:44] marthanizinski leaves the room [16:04:49] LAT : 35.293886 , LON : -74.949515 , DEPTH : 367.7827 m, TEMP : 8.23964 C, SAL : 35.12514 PSU, DO : 4.6042 mg/l [16:06:59] very fishy dive [16:09:38] @Tara: Fishy like you don't believe the moon landing...? [16:09:50] turbidity has improved ? [16:09:55] LAT : 35.293896 , LON : -74.94954 , DEPTH : 367.042 m, TEMP : 8.39579 C, SAL : 35.13062 PSU, DO : 4.48697 mg/l [16:10:50] @scott lol. Fishy as in lots of fishes! [16:11:19] adriennecopeland leaves the room [16:11:35] and as fishes are well outside my area of expertise, I'm not able to contribute very much! [16:13:34] jamesmurphy leaves the room [16:14:50] LAT : 35.293777 , LON : -74.949605 , DEPTH : 361.4676 m, TEMP : 8.457 C, SAL : 35.13133 PSU, DO : 4.46275 mg/l [16:18:05] Have been on a conference call related to the sample database for past hour+. Will try to be more engaged now. [16:19:51] LAT : 35.293736 , LON : -74.949768 , DEPTH : 358.232 m, TEMP : 8.40149 C, SAL : 35.13089 PSU, DO : 4.49885 mg/l [16:22:50] It appears to be snowing ctenophores. [16:23:32] enriquesalgado leaves the room [16:23:51] @Tara: Are we diving on Pandora... [16:24:16] back to numerous small holes [16:24:50] @Tara: that was an Avatar reference in case it was too obscure... [16:24:58] LAT : 35.293666 , LON : -74.949876 , DEPTH : 354.1258 m, TEMP : 8.4339 C, SAL : 35.13229 PSU, DO : 4.45299 mg/l [16:26:14] again hole edges are shaggy [16:26:22] @Scott I got it! [16:26:32] @scott it took me a minute, but yes! [16:27:03] @Sci Has Chris Mah commented on the seastars today? I'm quickly reviewing the footage from earlier today. [16:28:25] We haven't heard from Chris today. We were thinking most were mud stars like we saw a few dives ago? [16:28:42] @ cheryl all these small holes have no obvious excavated darker sediment around them...whatever that indicates??? Interesting [16:29:34] @ Bob- bubbles created holes? [16:29:44] @bob....Yeah, I really am beginning to believe these are places of lots of small gas escapes, similar to what we've seen on f-grained surfaces in GOMex...but I'm not ready to say that aloud yet [16:29:51] @cheryl---Probably yes... [16:30:02] LAT : 35.293665 , LON : -74.949936 , DEPTH : 353.672 m, TEMP : 8.43801 C, SAL : 35.13053 PSU, DO : 4.44892 mg/l [16:30:03] maybe [16:31:46] My best biological guess would be bivalves...but lack of siphon and lack of dead shells would seem to rule that out. Burrowing shrimp also can be very abundant, but they usually have a distinct ejecta mound...by elimanation bubbles [16:32:50] And likely too many holes to have been created by cerianthid anemones or sea pens... [16:33:38] What is the white thing left of fish [16:33:50] @cheryl--going to send you a Chirp image in a few minutes....This part of slope is extraordinarily gassy; as we go upslope, can see more "pipes" of gas.... [16:34:02] Acorn worm...? [16:34:42] So...if large volumes of methane bubbles out...does seawater flow into the sediment..."recharge" area if you will? [16:34:53] LAT : 35.293501 , LON : -74.949973 , DEPTH : 354.7009 m, TEMP : 8.43056 C, SAL : 35.1319 PSU, DO : 4.4775 mg/l [16:35:01] @ scott- missed the white thing- sorry! [16:35:33] @carolyn- interesting! [16:36:20] @Cheryl: I thouhgth pilots were moving to zoom in, but then they veered away! [16:37:08] @bob....it probably can...of course we don't know if this is a single expulsion event or happens at various times; at these water depths, pressure from overlying water column (even currents/waves can affect, as well as barometric...) important in driving emission events...so there could be times it bubbles like crazy and other times, like today, when it doesn't? Or it could have been one or a series of past events for which we see the remains now [16:37:15] @scott- new pilot Lars now [16:37:32] @Cheryl: roger, understood. [16:38:02] Maybe they are darting away from beaker whales! [16:38:24] My wife tells me this area is good for diversity of cetaceans... [16:38:52] @scott- beaked whales? That would be so cool! [16:39:03] @Tara: the cteno-storm continues... [16:39:19] @Cheryl: better even than the mola mola! [16:39:30] I would be happy to see a beaked whale chasing a squid. [16:39:53] LAT : 35.293421 , LON : -74.950176 , DEPTH : 350.015 m, TEMP : 8.44468 C, SAL : 35.13076 PSU, DO : 4.45458 mg/l [16:40:14] I just noticed that earlier I typed "beaker" whales! [16:40:41] I would be happy to see a beaked whale diving into the sediment, so i can believe the scour marks are made by beaked whales! [16:40:54] @ Sci back to the zillion holes...they look almost like they were "poked" in. [16:41:04] @Andrea: haha! Would be great to confirm that hypothesis. [16:41:59] @Bob: could they simply be "claw-prints" of Chaceon or something...? Are those heavy enough to pentrate deep enough to create such a hole? [16:44:06] Where we saw the potential beaked whale scours was much deeper, but this depth may be within the beaked whales usual diving depths? [16:44:22] not positive but maybe a gempylid [16:44:31] @Cheryl, [16:44:47] @scott crabs usually produce a distinct "dactly drag" sorta cuneiform like. To me its the exceeding abundance of holes that puzzles...but I haven't really looked at many bottoms this shallow [16:44:53] @mike did you see that midwater fish? [16:45:01] LAT : 35.293428 , LON : -74.95025 , DEPTH : 347.8065 m, TEMP : 8.48225 C, SAL : 35.13378 PSU, DO : 4.43587 mg/l [16:45:09] I understand they frequent heads of canyons, but am not sure what typical feeding depths are. I would guess they feed... where the squid are! [16:45:19] @Bob: thanks. [16:46:18] can you zoom fish [16:46:40] this is an argenitinia [16:46:50] and this is different from the last midwater fish we saw [16:47:48] looks like it [16:47:56] and a merluccius [16:48:02] adriennecopeland leaves the room [16:49:54] LAT : 35.293335 , LON : -74.950309 , DEPTH : 347.8464 m, TEMP : 8.53917 C, SAL : 35.1351 PSU, DO : 4.38568 mg/l [16:52:37] @Sci These sea stars we've been seeing are definitely in the Order Paxillosida (making them mud stars for sure) in the Family Astropectinidae and most likely in the Genus Plutonaster, according to Chris Mah's IDs from the other day. It seems that today we have been seeing just one species of mud star, while the two day's ago we saw at least two, one of them being Plutonaster (maybe same as this one) and the other was also a mud star but different genus, perhaps. [16:52:51] hmmm…i think this may be a Merluccius albidus, but if you see another one not so buried that would help because it may be a hake [16:53:21] that is definitely a hake. is this the same species that is buried? [16:53:46] Yes, we saw one buried earlier today also [16:54:14] could be U. regia though, not the southern hake. would need another zoom to confirm [16:54:29] scottharris leaves the room: Replaced by new connection [16:54:54] LAT : 35.293299 , LON : -74.950422 , DEPTH : 345.2326 m, TEMP : 8.54081 C, SAL : 35.13471 PSU, DO : 4.4096 mg/l [16:55:07] @cheryl--check your USGS email for the image I sent [16:55:46] scottharris leaves the room: Replaced by new connection [16:56:12] @Leslie You did great! [16:58:22] could one of the bio people explain why the fish are going nuts? [16:58:41] darting all over, running into the bottom then swimming off etc? [16:59:55] LAT : 35.293192 , LON : -74.950579 , DEPTH : 340.2825 m, TEMP : 8.5982 C, SAL : 35.13744 PSU, DO : 4.37521 mg/l [17:00:00] @Carolyn: I imagine they are being startled by the lights and blinded, and simply reacting to escape... [17:00:25] @Leslie I initally thought of asteropecten as well, but i pulled up my screen shots from two days ago and it looked the same as the Plutonaster. [17:01:01] interesting, maybe these BBRF are juveniles/sub-adults. Smaller than those observed in hard bottom and lophelia habitats? [17:04:20] @Andrea - I'd wondered that too, and for the eelpouts - we saw tons of little ones at the beginning of the dive (with some larger ones. [17:04:30] Yes, these seem like smaller BBRF and we [17:04:55] LAT : 35.293212 , LON : -74.950615 , DEPTH : 339.9115 m, TEMP : 8.48953 C, SAL : 35.13373 PSU, DO : 4.42496 mg/l [17:05:04] ve seen lots of them! They don't dig burrows, just use others, right @andrea? [17:05:20] @leslie cool obs. [17:05:35] @cheryl right, i don't think they make these burrows [17:06:30] stevenauscavitch leaves the room [17:09:55] LAT : 35.293204 , LON : -74.950617 , DEPTH : 339.6329 m, TEMP : 8.44386 C, SAL : 35.13167 PSU, DO : 4.442 mg/l [17:10:00] do red crabs make these large of burrows? [17:10:15] More midwater fishes, right @andrea? [17:11:20] I haven't seen red crabs making burrows- more observations of them under ledges [17:11:46] I have seen them in burrows in soft sed areas [17:11:59] Chauliodus [17:12:24] Not sure how far north the golden crab goes and whether they differ in burrowing behavior [17:14:56] LAT : 35.293225 , LON : -74.950747 , DEPTH : 338.6541 m, TEMP : 8.47337 C, SAL : 35.13523 PSU, DO : 4.4283 mg/l [17:15:25] We've seen many more Cancer crabs relative to red or golden crabs here [17:19:56] LAT : 35.293167 , LON : -74.950642 , DEPTH : 338.5801 m, TEMP : 8.45069 C, SAL : 35.13268 PSU, DO : 4.43888 mg/l [17:22:48] @Sci,,,ROV/robitics question...can movements be programmed in advance? For example...enter a command..."get scoop", and robotics would then move scoop and manip to the right place. [17:23:04] heatherjudkins leaves the room [17:24:57] LAT : 35.293175 , LON : -74.950658 , DEPTH : 338.5039 m, TEMP : 8.46896 C, SAL : 35.13141 PSU, DO : 4.38574 mg/l [17:25:49] @Bob: I know they have software capable of auto-movements of the ROV in space, i.e. 40 cm forward, 20 cm starboard, etc, but I don't think it is so for the manipulator. I'm obviously not the one to give you best answer, of course! [17:26:36] @Bob- I don't think manip can be programmed that way, but will inquire once sample is complete [17:29:57] LAT : 35.293174 , LON : -74.95065 , DEPTH : 338.5597 m, TEMP : 8.47824 C, SAL : 35.13177 PSU, DO : 4.36098 mg/l [17:31:01] @sci how are the sediments being processed? Are you siphoning them from the box? Just curious [17:31:08] johnreed leaves the room [17:31:43] jamesmurphy leaves the room [17:32:27] @amanda yes, mostly siphoned, though some scooped. About half is kept raw and other half sieved. Obviously not a quantitative sample [17:32:35] Do this ROV have coring capabilities like we used to have on the Johnson-Sea-Link submersibles? [17:32:38] you know, i wonder if some of these large burrows are tilefish burrows. [17:33:06] @John: no, there are no push cores mounted on the ROV. [17:33:16] @cheryl, thanks! Do you look at the sieved material under the scope? [17:33:30] golden crab distribution: mid-Atlantic Bight - Gulf of Mexico. [17:33:41] there is a species known to depths of ~~500 m, so its possible [17:34:19] @ andrea tilefish/Hatteras http://www.carolinasportsman.com/details.php?id=2564 [17:34:42] @andrea, do u mean the large wide burrows? [17:34:53] @bob thanks did you already discuss this as a possibility? [17:35:01] LAT : 35.293177 , LON : -74.950652 , DEPTH : 338.5057 m, TEMP : 8.53035 C, SAL : 35.13419 PSU, DO : 4.34258 mg/l [17:35:01] johnreed leaves the room [17:35:10] all--if you used to be on the audio, the only people on right now are me and the ship....I think most of us lost the audio line, so you may need to call back in [17:35:22] @andrea...not discussed [17:35:50] @amanda, yes both deep and large, wide burrows [17:36:37] @martha- is? [17:36:51] I have a report I wrote for SAFMC discussing our JSL observations of golden crab and tilefish off eastern Florida (both blueline and golden); 2010 SAFMC NMFS Golden Crab Tilefish REPORT- FINAL Text w Appendix 9-15-2010 [17:37:03] oops- martha, golden crab or red crab? [17:37:36] @bob that article does discuss the Great northern or Golden tilefish, Lopholatilus chamaeleonticeps, which is known to depths of 540 m according to fishbase [17:38:05] @john- did you have observations for golden crabs creating burrows? [17:39:17] golden crab (C. fenneri) occurs from Mid-Atlantic to Gulf of Mexico; red crab (C. quinquedens) occurs from Nova Scotia to Gulf of Mexico [17:39:26] Golden tilefish make large burrows in high clay muds- typically make a depression 2-3 m diameter, with a near vertical shaft at bottom. [17:39:58] LAT : 35.293155 , LON : -74.950753 , DEPTH : 334.9556 m, TEMP : 8.65405 C, SAL : 35.14244 PSU, DO : 4.31255 mg/l [17:40:15] I don't think we've seen any burrows that large [17:40:46] I have not seen evidence of golden crab making burrows. Although we see them in all habitats from rocky escaprments to mud bottom, they don't burrow that i know of. [17:42:19] @cheryl if you can take a closer look, they might be siboglinid polychaete tubes, related to the big tube worms found at vents and seeps [17:42:30] To quote Bubbles the yellow tang from Finding Nemo: "BUBBLES!" [17:43:19] Here is a paper on the golden crab- Reed, John, Stephanie Farrington, Charles Messing, Andrew David. 2017. Distribution and habitat use of the golden crab Chaceon fenneri off eastern Florida based on in situ submersible and ROV observations and potential for impacts to deep water coral/sponge habitat. Gulf and Caribbean Research Vol. 28:1-14. DOI: 10.18785/gcr.2801.03 [17:44:44] not pogos, right? [17:44:59] LAT : 35.293098 , LON : -74.95078 , DEPTH : 334.6353 m, TEMP : 8.67108 C, SAL : 35.14264 PSU, DO : 4.28604 mg/l [17:45:10] @cheryl siboglinids = pogonophs [17:45:35] oh- good! I'm not as confused as I thought! [17:45:43] pogonophora was the former phyla [17:46:02] a paper by Pierdomenico 2015, looking at geological structures at the head of hudson canyon, states that "Hummocky terrain has been delineated along the canyon rims and associated with extensive, long-term burrowing activity by golden tilefish" [17:46:50] but even as I squint at the screen, i'm not sure [17:47:30] The old taxon Pogonophora has been synonomized into the family Siboglinidae, now subsumed in the sabellid polychaetes. A big come down for a former phylum! [17:48:03] Poor pogos! [17:48:07] @andrea There is identified (by NMFS) golden tilefish habitat at these water depths in the "banks" of some canyons farther north (e.g., Norfolk)...Just went through this for an environmental assessment...I checked, and we are not in essential/critical fish habitat for golden tilefish as delineated by them for this particular area [17:49:02] sabellids/sibos are a pretty cool bunch, so they are in good company [17:49:11] Squiggly white tiny "tubes" remnants of calcified portions of Sclerolinum contortum ? [17:49:26] @carolyn, yes not really sure and just going down a wormhole of reading about tilefish burrowing [17:49:51] @andrea--what i wrote exhausts my knowledge of the subject [17:49:56] ha [17:50:00] LAT : 35.293159 , LON : -74.950949 , DEPTH : 334.0488 m, TEMP : 8.628 C, SAL : 35.13942 PSU, DO : 4.30831 mg/l [17:50:08] enteropnuse? in patch? [17:50:24] @bob we saw large patches of the white squigglys next to live Sclerolinum in the GOM [17:50:47] @amanda...I remember [17:50:49] @bob i think you id'd them for the EX [17:51:38] I sent a pub link to Diva Morphology, microanatomy and sequence data of Sclerolinum contortum (Siboglindae, Annelida) of the Gulf of Mexico September 2013Organisms Diversity & Evolution 13(3) DOI10.1007/s13127-012-0121-3 Irmgard Eichinger, Stéphane Hourdez, Monika Bright [17:53:39] i don't think we've observed any sclerolinum-like siboglinids along the atlantic margin before. so far we've only come across the siboglinum-like which builds tiny brownish tubes that usually stick straight out of the sediment [17:54:27] this area looks very promising..some kind of patchy emissions? wonder how long ago this started given lack of traditional chemos other than mats...or whether something about substrate/currents prevents colonization e.g. by mussels [17:54:28] holes have a "lip" [17:55:00] LAT : 35.293121 , LON : -74.95082 , DEPTH : 333.8442 m, TEMP : 8.60204 C, SAL : 35.13865 PSU, DO : 4.29491 mg/l [17:56:05] pretty shallow 334m [17:56:28] @cheryl if they can get the lasers on one of these when the bubbles are coming out...that would be super [17:57:53] @cheryl--thank you....no worries... [17:57:56] @cheryl- we saw this fluffy marshmellow type white material at the norfolk and baltimore seeps, plus NE seeps. not sure what it is composed of [17:58:59] but Amanda did succeed in sampling it last year ! [17:59:16] @cheryl, you didn't want to say marshmellow! [17:59:34] I almost did Amanda! [17:59:49] oh come on :) [18:00:00] LAT : 35.293112 , LON : -74.950811 , DEPTH : 334.1477 m, TEMP : 8.62979 C, SAL : 35.14236 PSU, DO : 4.32516 mg/l [18:00:16] Looks like the proboscis of an echiuran spoon worm [18:00:27] the beige thing to left of fish head [18:00:36] Now retracted [18:00:49] @scott - i was thinking the same thing [18:01:04] Gulp! [18:01:19] Mine! Mine! [18:01:23] opportunist [18:01:32] that was a big bite [18:01:47] some of us must be delayed....the fish has just shown up to eat it [18:02:00] That is one spunky fish. [18:02:11] anything else to eat around here? [18:02:25] @Carolyn: depends on the feed you are streaming and the speed of your connection... [18:02:54] @scott--on secure wireless @ MIT, which is probably the issue...thx! [18:03:05] @Carolyn: delay anywhere from 4 to 10 seconds on full-res, up to 30 sec on public feed [18:03:20] @Carolyn: yup. Wireless typically a bit more delayed. [18:03:53] @sci are we allowed to keep the lasers on for a little while, as we transit? [18:04:31] lasers staying on [18:04:51] lesliesautter leaves the room [18:05:01] LAT : 35.293093 , LON : -74.950931 , DEPTH : 333.1846 m, TEMP : 8.64831 C, SAL : 35.14195 PSU, DO : 4.31529 mg/l [18:05:34] @cheryl, thanks! [18:08:18] @cheryl the squiggly white "tubes" are not Sclerolinum itself but are associated w/ Sclerolinum patches in GoM [18:08:53] Thanks Bob- these are new to me, as you can tell! [18:09:58] squiggly white tubes could just be another large microbe morphology [18:10:11] LAT : 35.293062 , LON : -74.950864 , DEPTH : 332.8719 m, TEMP : 8.60577 C, SAL : 35.14093 PSU, DO : 4.32257 mg/l [18:10:49] Sclerolinum looks like a ramen noodle [18:13:18] @sci The scoop sample have a <1cm oxidized layer, not very dark under that no hints as to the small holes [18:13:43] @bob - thanks. too bad. [18:14:37] Agree that that now looks like the proboscis of an acorn worm/enteropneust [18:15:02] LAT : 35.293047 , LON : -74.9509 , DEPTH : 332.5138 m, TEMP : 8.56126 C, SAL : 35.13839 PSU, DO : 4.35491 mg/l [18:15:11] curious probosis looks bifid [18:20:02] LAT : 35.293006 , LON : -74.950921 , DEPTH : 331.5585 m, TEMP : 8.54583 C, SAL : 35.13902 PSU, DO : 4.37245 mg/l [18:20:29] Big school of Illex [18:21:30] Now I'm watching Seirios cam in hopes of a chase... [18:23:12] Also lots of shrimp in the Seirios cam in foreground. [18:23:44] I like how they seamlessly get in formation... as if there is a squid traffic controller somewhere [18:24:30] @Les: They've been in schools all their lives to learn how to do that... [18:24:48] haha... good one @Scott [18:25:03] LAT : 35.293002 , LON : -74.950997 , DEPTH : 331.6022 m, TEMP : 8.53902 C, SAL : 35.13784 PSU, DO : 4.33815 mg/l [18:25:36] Look into the holes- if active burrow- it would have a shaft at the bottom in which they sit [18:26:03] adriennecopeland leaves the room [18:27:07] gotta go. See you all tomorrow. [18:27:34] thanks for your help, tara! [18:27:45] taraluke leaves the room [18:27:54] gas-related features typically have a specific morphology that includes slightly elevated rims...plus these features are pretty small...gas related ones are sometimes a meter (or even many tens of meters) across [18:28:12] Tilefish sit in the shaft looking out for prey swimming by, like jaw fish. [18:30:03]