[00:47:10] kaseycantwell leaves the room: Replaced by new connection [03:22:31] kaseycantwell leaves the room [07:11:09] chat-admin leaves the room [07:11:39] andrewobrien leaves the room [11:45:14] Predive Test [12:10:17] EX1806_DIVE17 ROV Launch [12:16:41] EX1806_DIVE17 ROV on Surface [12:17:09] EX1806_DIVE17 ROV Descending [12:17:58] LAT : 36.228526 , LON : -74.464666 , DEPTH : 16.3373 m, TEMP : 15.36246 C, SAL : 34.0097 PSU, DO : 8.46123 mg/l [12:22:59] LAT : 36.228131 , LON : -74.464408 , DEPTH : 59.0984 m, TEMP : 11.13005 C, SAL : 34.55922 PSU, DO : 7.39004 mg/l [12:27:59] LAT : 36.227843 , LON : -74.464932 , DEPTH : 206.9238 m, TEMP : 11.69622 C, SAL : 35.47459 PSU, DO : 5.06296 mg/l [12:33:00] LAT : 36.227983 , LON : -74.464852 , DEPTH : 347.2141 m, TEMP : 7.99815 C, SAL : 35.13313 PSU, DO : 4.89829 mg/l [12:38:00] LAT : 36.228049 , LON : -74.464594 , DEPTH : 496.4756 m, TEMP : 5.83066 C, SAL : 35.05192 PSU, DO : 6.62302 mg/l [12:43:01] LAT : 36.228048 , LON : -74.464287 , DEPTH : 641.4976 m, TEMP : 5.08894 C, SAL : 35.01914 PSU, DO : 7.32202 mg/l [12:48:01] LAT : 36.228081 , LON : -74.463986 , DEPTH : 787.7319 m, TEMP : 4.72781 C, SAL : 34.99968 PSU, DO : 7.63211 mg/l [12:53:02] LAT : 36.228084 , LON : -74.463781 , DEPTH : 937.6836 m, TEMP : 4.53077 C, SAL : 34.9885 PSU, DO : 7.78493 mg/l [12:58:02] LAT : 36.2282 , LON : -74.463708 , DEPTH : 1092.9735 m, TEMP : 4.31983 C, SAL : 34.97723 PSU, DO : 7.91044 mg/l [13:03:03] LAT : 36.228335 , LON : -74.463788 , DEPTH : 1242.9482 m, TEMP : 4.15521 C, SAL : 34.96874 PSU, DO : 7.98855 mg/l [13:08:03] LAT : 36.228411 , LON : -74.463658 , DEPTH : 1394.3186 m, TEMP : 4.0453 C, SAL : 34.96439 PSU, DO : 8.01745 mg/l [13:10:43] @kasey i sent u a message in chat [13:10:43] adriennecopeland leaves the room [13:11:49] meganmcculler leaves the room [13:13:04] LAT : 36.228502 , LON : -74.463699 , DEPTH : 1547.2807 m, TEMP : 3.88345 C, SAL : 34.9613 PSU, DO : 8.03124 mg/l [13:14:07] adriennecopeland leaves the room [13:18:04] LAT : 36.228477 , LON : -74.463725 , DEPTH : 1701.4111 m, TEMP : 3.6777 C, SAL : 34.95055 PSU, DO : 8.08009 mg/l [13:21:53] Good Sunday morning! The sea is glassy calm today out here. Great day for our last dive! [13:22:34] good morning [13:23:05] LAT : 36.228546 , LON : -74.463677 , DEPTH : 1851.4378 m, TEMP : 3.62755 C, SAL : 34.94793 PSU, DO : 8.05531 mg/l [13:23:36] EX1806_DIVE17 ROV on Bottom [13:25:03] Good morning! [13:25:14] fish :) [13:25:29] maybe antimora (fish) [13:26:03] Good morning [13:27:31] Well, we made it to the bottom faster than planned. [13:28:05] LAT : 36.228739 , LON : -74.463533 , DEPTH : 1878.7338 m, TEMP : 3.59524 C, SAL : 34.94763 PSU, DO : 8.04981 mg/l [13:29:08] @kasey- please see my message [13:33:06] LAT : 36.228841 , LON : -74.463729 , DEPTH : 1878.5321 m, TEMP : 3.59236 C, SAL : 34.9462 PSU, DO : 8.01089 mg/l [13:38:06] LAT : 36.228927 , LON : -74.463739 , DEPTH : 1878.1934 m, TEMP : 3.59109 C, SAL : 34.94665 PSU, DO : 8.01283 mg/l [13:38:16] should also mention that the level of biological colonization of the seafloor in areas of know disturbance is something we are looking at to estimate timing and impact of failure events - low diversity and low abundance as compared to that outside the landslide boundary suggests a "younger" age [13:38:28] "younger" being a very spongy term [13:43:06] LAT : 36.229151 , LON : -74.463546 , DEPTH : 1878.8386 m, TEMP : 3.59474 C, SAL : 34.94669 PSU, DO : 8.01879 mg/l [13:45:02] looks like there might be a sipunculid moving around on the left of the urchin [13:45:51] zachproux leaves the room [13:48:07] LAT : 36.229271 , LON : -74.463684 , DEPTH : 1879.4029 m, TEMP : 3.59596 C, SAL : 34.94655 PSU, DO : 8.02501 mg/l [13:49:06] we have dated the last major landslide have occurred here at 14-16 thousand years ago...I have been watching the dives instead of working on revisions of that paper reporting those numbers [13:49:41] is it a halosaur? check out the tail [13:50:58] that extended caudal is tell tale (tail :)) [13:51:13] haha [13:52:13] head had scales, which also helps with species ID, other halosaurs that we have seen have had scale-free heads, which is one type of species [13:52:29] sweet [13:52:52] come on, i had the tell tale joke set up for you all :) [13:53:07] LAT : 36.22929 , LON : -74.463938 , DEPTH : 1878.3613 m, TEMP : 3.59425 C, SAL : 34.94677 PSU, DO : 8.02957 mg/l [13:53:45] picking up more rock debris [13:56:07] those small worm like animals on sediment surface might be aplacophorans but I can't tell for sure... [13:56:45] lots of small "mud" clasts scattered around. The debris from the landslide contains massive amounts of the rounded "clay balls" [13:58:08] LAT : 36.229596 , LON : -74.464053 , DEPTH : 1878.1363 m, TEMP : 3.59784 C, SAL : 34.94623 PSU, DO : 8.02577 mg/l [13:58:38] We saw a small fish weaving around the spines of an urchin on a dive a few days ago, didn't we? [13:59:01] Yes - Peter Auster has a paper... will dig it up. [13:59:23] I am guessing these are not from the big landslide, but rather from slow degredation of the scarp that formed during that event....the transition from the hemipelagic-only sedimented seafloor to a debris covered seafloor is characteristic of this [13:59:59] hygrosoma? [14:00:04] The urchin is a Hygrosoma. [14:00:13] ha @scott [14:00:24] good morning, i mean [14:00:40] Hi Amanda. Haven't had my coffee yet! :-) [14:01:12] The paper (by Jon Moore and Peter Auster) describes a commensal relationship between small (approximately 6 to 9 cm) deep-sea cusk eels, one tentatively identified as Barathrites sp. (Osteichthyes: Ophidiidae), and pancake urchins, both Hygrosoma petersi and Phorosoma placenta [14:01:16] how many times do i have to see these urchins in order to actually remember the name? i'm not remembering... [14:01:56] @Amanda: same here. I only "remember" by looking up the Moore and Auster paper! [14:02:27] We could hear you Jason. [14:03:08] LAT : 36.230134 , LON : -74.464145 , DEPTH : 1878.3102 m, TEMP : 3.59425 C, SAL : 34.94185 PSU, DO : 8.02649 mg/l [14:03:18] Sounds like the title of a good kid's book, "The u [14:03:24] More: "Cusk eels foraged around the periphery of urchins and took refuge at the base and among the long spines on the aboral surface. We suggest that such associations provide juvenile cusk eels with shelter from predators or flow (or both) and access to prey far from other forms of refugia" [14:03:26] "The urchin and the eel" [14:04:05] I recognize this anemone, but don't recall the name. [14:04:10] I am really good at picking interesting biology dives :-) [14:04:24] Thanks Jason! [14:04:39] Yes you are= thank you Jason! :) [14:04:51] Or perhaps I recognize it and we never had a name! [14:04:55] my geology card is once again in danger of being revoked [14:05:36] Never! We WILL find great rocks! [14:06:11] I"m hoping for good rocks as well! (with corals, of course) [14:06:38] @scott, i've become too Mah and google dependent [14:07:56] these displaced rock masses are really interesting for evaluating timing when they have corals and other sessile organisms on them..either they stayed attached while tumbling downslope (possible, but unlikely) or attached once it settled in its final resting place [14:08:09] LAT : 36.230769 , LON : -74.462909 , DEPTH : 1877.3498 m, TEMP : 3.57543 C, SAL : 34.94633 PSU, DO : 8.02576 mg/l [14:08:32] @Amanda: Not too sound like my grandfather, but back when we were grad students we couldn't rely on such sources. At least there is some benefit to the internet! [14:09:33] Maybe they settled as larvae... [14:10:11] I mean the brittle stras on that displaced rock. [14:10:26] carolynruppel leaves the room [14:10:47] That would be my guess too Scott [14:12:22] Psolidae holothurian [14:13:09] LAT : 36.230303 , LON : -74.464874 , DEPTH : 1878.4762 m, TEMP : 3.58589 C, SAL : 34.94638 PSU, DO : 8.02234 mg/l [14:14:55] Is that a scale woerm or something else on that rock? [14:14:57] Purple thing on rock? [14:15:05] from the audience for the urchin earlier: Linda Stalnaker https://www.ncddc.noaa.gov/.../images/SeaUrchinsOther019.jpg [14:15:18] OOhh. [14:15:49] purple thing on rock looked platy to me, like a chiton [14:16:24] are all the brown lumps on the sediment surface sediment? just wondering if some are xenophyophores [14:16:49] @Amanda: right - didn't look quite right for a scale worm, but didn't have a good enough view. [14:17:42] That might be asexual spreading from the colony base... [14:18:05] Broken up cerianthid tube, perhaps... [14:18:10] LAT : 36.229952 , LON : -74.464833 , DEPTH : 1878.0916 m, TEMP : 3.58284 C, SAL : 34.9476 PSU, DO : 8.03354 mg/l [14:18:25] Or an old burrow of a crab or something [14:18:56] @Scott, @Amanda: I'm looking at a screenshot and it looks more like a scale worm to me. The scales are paired along the body [14:19:12] @Megan: thanks! [14:19:54] Hello all [14:20:04] It looks like something has burrowed and deposited mucus on inside, which preserves the structure... [14:21:57] morning brittle star yoga [14:22:40] I think I recall Chris saying they may take this position when releasing gametes, which exit through slits on either side of the arms. [14:22:53] Paramuricea of some kind. [14:23:10] LAT : 36.229886 , LON : -74.464683 , DEPTH : 1877.6907 m, TEMP : 3.59613 C, SAL : 34.94721 PSU, DO : 8.01694 mg/l [14:23:17] Paramuricea with asteroschma brittle star [14:24:29] @megan, thanks! i didn't have a great view, but glad there is always a second chance to review [14:25:23] @megan- thanks! [14:25:45] another halosaur? [14:26:01] sorry @cheryl, missed it [14:26:13] ghostly white [14:26:29] oh cool [14:26:56] jennahill leaves the room: Replaced by new connection [14:27:00] yes halosaur [14:27:09] not sure which one, as usual [14:28:10] LAT : 36.230511 , LON : -74.464972 , DEPTH : 1876.9981 m, TEMP : 3.59065 C, SAL : 34.94695 PSU, DO : 8.01088 mg/l [14:28:40] Urchin feeding frenzy [14:28:54] oh interesting. they're eating a lion's mane [14:28:56] Jellyfish foodfall [14:29:30] There have been a few recent studies looking at the importance of jellyfish foodfalls to the deep sea. [14:30:24] Another way organic carbon from the water column gets recycled by the benthic community... [14:30:46] ...and how important these "packages" of food are to the benthic fauna. [14:32:53] video full-res looks like a slide show...no real motion [14:33:11] LAT : 36.230008 , LON : -74.464923 , DEPTH : 1877.1851 m, TEMP : 3.61328 C, SAL : 34.9484 PSU, DO : 8.01608 mg/l [14:33:55] those anemones look familiar [14:34:18] Yes, I think we've seen them in the GOM [14:35:01] Anemone looks like Actinerus nobilis seen in the Pacific. See https://www.ncddc.noaa.gov/okeanos-animal-guide/ActiniariaOther002.html [14:35:38] Maybe that's why they seem familiar [14:35:45] or https://www.ncddc.noaa.gov/okeanos-animal-guide/ActiniariaOther001.html [14:37:28] Maybe the same or a sister species [14:38:05] have food in my mouth [14:38:11] LAT : 36.23002 , LON : -74.465185 , DEPTH : 1873.6492 m, TEMP : 3.62727 C, SAL : 34.94833 PSU, DO : 8.01061 mg/l [14:38:41] alright show me the bryozoans! [14:39:05] the animal guide needs expanding to include Atlantic species [14:40:03] Is thius a bramble bamboo in seds? [14:40:30] Wow! DSure enough! [14:40:44] True Les! I've been wanting to pull picts from each dive, but haven't completed that, or all the dive summaries! Maybe summer vacay plans [14:41:15] Something like Keratoisis flexibilis. They do grow in this bramble like shape [14:42:07] Nice bramble, but I can't tell you right now which one that is. It has angled branches but will need to check Abby's guide to see what it is. [14:42:40] @Scott - is this the "same" bramble type that we saw on the New England Seamounts? [14:43:02] @Tim: that is one guess, which is where I come up with the ID of K. flexibilis. [14:43:12] LAT : 36.230028 , LON : -74.46528 , DEPTH : 1873.5042 m, TEMP : 3.63308 C, SAL : 34.94865 PSU, DO : 8.00467 mg/l [14:43:18] looks like the barnacles are on segments that don't host polyps (close by) [14:43:28] agree [14:43:47] @Tim: but as Les will note, there is also the bramble from Nashville (or Retriever - not sure which) that was very different. But that one had no nodes! [14:44:23] There are actually three brambles on the NES. This one I think is what Abby and I call Bramble D1....but will look it up. [14:44:29] @Jason - just give a holler if you want a collection - looks like many different rocks here, so as we get closer... [14:44:50] @sci: earlier we had a very brief view of a red stick sea pen. Please be on the look out for it. It may be the rare Distichoptilum. [14:45:00] @leslie this big one right here :-) [14:45:07] And they are in different clades, so not closely related [14:45:25] ok that looks a bit like a slime star [14:45:36] We can TRY! :) [14:45:58] @Les: right [14:46:33] everyone except the EX CO [14:46:52] agree for the collection this ROCK :) [14:48:12] LAT : 36.229999 , LON : -74.465287 , DEPTH : 1871.3661 m, TEMP : 3.62899 C, SAL : 34.94875 PSU, DO : 8.01716 mg/l [14:49:27] Looks like a cladorhizid sponge [14:49:36] Yes, carniorous (a demosponge) [14:49:48] carnivorous [14:50:00] Lots of fan worms! [14:50:14] Must be pretty good water flow through here. [14:50:43] The bramble we saw looks like one we collected and is in clade J3. So we are calling it bramble J3a. There are also brambles in two other unrelated clades. [14:52:15] bramble J3a is also partly on sediment and partly on subfossil coral, D. dianthus [14:52:45] Thanks @Les. Is that the NES bramble you are looking at, or Bahamas? Or both! [14:53:13] LAT : 36.229979 , LON : -74.465257 , DEPTH : 1869.7791 m, TEMP : 3.63197 C, SAL : 34.94952 PSU, DO : 8.01998 mg/l [14:54:01] NES [14:54:33] wow looks like a giant hydroid to me [14:54:43] Oh noce - corymorphid solitary hydroid [14:55:00] good one @Megan! [14:55:10] @Jason - do you have an estimate of the age of the oldest rocks we might encounter at this segment of the wall? [14:55:25] Like in the tubularid hydroids, the grape-like stuff is reproductive organs [14:55:37] yes solitary hydroid! [14:55:51] Mouth is on a slender "stalk" [14:55:57] @jason (in situ) [14:56:11] @Scott, yes! looks exactly like a giant Tubularia polyp [14:56:44] If you want more ID info, go to https://www.ncddc.noaa.gov/okeanos-animal-guide/HydrozoaOther008.html [14:57:03] Nicely see the hyostome there (stalk with mouth) [14:57:06] ervangarrison leaves the room [14:57:11] sorry - hypostome [14:57:30] @Leslie, The deposit here is all Quaternary... [14:57:43] I think one time @Tina had explained the difference between Corymorpha and Branchiocerianthus was the shape of the hypostome, circular in the former and oval in the latter. [14:58:08] Thanks @Les - I always forget the name of Branchiocerianthus [14:58:18] LAT : 36.230103 , LON : -74.465237 , DEPTH : 1869.8065 m, TEMP : 3.63341 C, SAL : 34.94837 PSU, DO : 8.00496 mg/l [14:58:27] And, did this one look oval? [14:59:00] sipunculids [14:59:09] thanks @Jenna, I was trying to pull up the records [14:59:35] These worms are likely sipunculids, as noted by Bob. "Peanut worms" [14:59:46] what are the worms> [14:59:50] oh cool... [14:59:56] Thanks Jenna. [15:00:08] some sipunculids are "endolithic" [15:00:24] Those would be the "introverts" of the sipunculids... [15:00:37] the rock looked to have high iron content nodules [15:00:43] ...an evertible structure at the anterior end of the worm that bears the mouth [15:01:23] I don't recognize this Chrysogorgia... Les? [15:01:38] No good idea. branches are close together and short [15:01:49] Fiarly long, what look like unbranched branches [15:02:04] Would this be something to collect a piece of? [15:02:14] Phylum Sipuncula was recently submerged within phylum Annelida (along with phylum Echiura - spoon & innkeeper worms). [15:02:25] @Les: by "lonhg" I emant that the branches didn't look to be subdividing [15:02:30] would be good I think [15:02:37] starting to see more angular boulders, suggesting the wall is breaking along bedding planes and fractures [15:02:49] there is also a worm on axis [15:03:07] A worm and an anemone [15:03:15] LAT : 36.229997 , LON : -74.465407 , DEPTH : 1867.9195 m, TEMP : 3.6317 C, SAL : 34.94786 PSU, DO : 8.00601 mg/l [15:04:11] @leslie think we could grab that rock just to the top left of the worm? [15:04:19] Is that an egg case in background? [15:04:33] Avcanella! [15:04:36] has both "fresh" and bored surfaces [15:04:47] Acanella bamboo coral [15:04:56] @jason Will try, yes! [15:05:08] scrawny looking Acanella [15:05:18] Hi Alll [15:05:32] Hi Tina! [15:05:40] Yes, it was scrawny [15:05:52] @Tina - hi. [15:05:59] sabellid? [15:06:01] Hi Tina! [15:06:07] Fuzzy tree agglutinating foraminiferans on some of the rocks. [15:06:29] So the question is whther that is Acanella arbuscula or the newly described Acanella scarletae, known so far only from trawled samples in Norfolk Canyon (from the Pathways to the Abyss canyons project) [15:06:46] Hi @Tina, thought maybe you were watching the world cup football match.... [15:07:26] can be zoom at anthomastus as well? [15:07:34] Setting up for collection of Chrysogorgia sp [15:07:43] NO. my daughter is visiting me [15:08:02] The best Geology makes the best Biology! [15:08:13] Zoom on the list before we leave this area Tina [15:08:18] LAT : 36.230146 , LON : -74.465339 , DEPTH : 1868.2051 m, TEMP : 3.63087 C, SAL : 34.94867 PSU, DO : 8.00394 mg/l [15:08:31] the rocks here do seem remarkably clean [15:08:42] @Jenna - certainly true for the deep sea! [15:08:48] good. I have names for yesterday shrimps [15:09:42] @les - much more recently 'tumbled' from the wall, likely. Those are the fresh surfaces. [15:09:54] Hi Tina :-), what are they? [15:10:27] Great Tina! [15:10:36] Try to clip as low as you can! [15:10:48] Given small size. [15:10:53] @Leslie, thanks [15:11:33] I was thinking if you cut too high then the part you get moight be damaged in the claw closure, thius my request to cut lower. Thanks [15:13:14] LAT : 36.23001 , LON : -74.465374 , DEPTH : 1867.8899 m, TEMP : 3.63059 C, SAL : 34.94874 PSU, DO : 8.00554 mg/l [15:15:46] This one good? [15:15:57] yep [15:16:09] good [15:16:13] it might even break and be smaller [15:16:16] @tim, Mesopenaeus tropicalis (Bouvier, 1905). and some species of Plesionika - these are from yesterday [15:17:17] if it is root-less Acanella? [15:17:57] @Tina, which shrimp was buried in sediments? [15:18:15] LAT : 36.230071 , LON : -74.465355 , DEPTH : 1867.3814 m, TEMP : 3.63214 C, SAL : 34.94736 PSU, DO : 8.00743 mg/l [15:18:29] first one,Mesopenaeus tropicalis (Bouvier, 1905). with pleable eyes [15:19:10] @Tina- that's awesome- thanks for tracking these IDs down! [15:19:43] it was not me, it was Rudolf Burukovsky, he is shrimp guy) [15:21:21] @ Tina, please pass on my gratitude to Rudolf! [15:22:09] he is welcome to niice pictures of shrimps [15:23:15] LAT : 36.230077 , LON : -74.465316 , DEPTH : 1867.373 m, TEMP : 3.62915 C, SAL : 34.94834 PSU, DO : 7.99122 mg/l [15:23:46] Be interesting to push that "rock" thru some sediment sieves. [15:24:42] no cementation of the grains [15:25:24] was that a small eel swimming by? [15:26:07] Acanella again [15:26:19] @jason, how much sand do you see in these deposits? [15:26:24] another sp of ChrysoAnother Acanella with worm [15:26:34] polynoid [15:26:45] w polychaete" [15:26:50] @erv - have done that with several on this trip. [15:27:30] @jenna - primarily silt, with the biogenic component forming the bulk of the sand size fraction [15:27:52] @Leslie what are the fractions? [15:28:16] LAT : 36.230062 , LON : -74.465306 , DEPTH : 1867.2861 m, TEMP : 3.62943 C, SAL : 34.94854 PSU, DO : 8.00168 mg/l [15:28:26] echiuran worm proboscis [15:28:39] Those are bentic ctenophores! [15:28:49] combjelly [15:28:57] @jason - should we just refer to these "rocks" as indurated muds? i know "mudstone' indicates cementation, which these do not exhibit.. I'm assuming they are calcareous as well. [15:29:08] Platyctenida [15:29:14] the green thing= echiuran [15:29:21] green possible echiuran probosis [15:29:30] Orange things on the coral are benthic ctenophores [15:29:37] the red one has to be Anthomastus [15:29:41] @erv - only 63um sieve here. [15:29:49] I encouarge collection of this Acanella weith ctenophores [15:29:59] delay test [15:30:14] If it is A. arbuscula, it meets ASPIRE objectives. Otherwise it is the new species A. scarletae, which has never been imaged in situ and is known only from Norfolk Canyon [15:30:19] chatroom 20 second delay [15:30:31] @Leslie - thanks. [15:30:41] Any other thoughts? [15:30:52] green thing? nemertean? [15:31:01] ok for sampling both [15:31:15] there may be units with a higher terrigenous sand or macro-carbonate component as this general area was a Quaternary shelf-edge delta environment [15:31:19] agree with collection, also get ctenophores, which would be nice [15:31:31] Hi all [15:31:37] agree with collection [15:31:46] At Les: the anteriro end looked splayed like an echiuran proboscis [15:31:54] hi iris [15:32:02] Yes, request for Acanella with ctenophores placed! [15:32:17] Examples of the ctenophores: https://www.ncddc.noaa.gov/okeanos-animal-guide/Ctenophora011.html and https://www.ncddc.noaa.gov/okeanos-animal-guide/Ctenophora003.html [15:32:23] hi @Tina [15:32:58] it is good to have base [15:33:07] Is this Acanella arbuscula? [15:33:20] Fantastic to also have the holdfast! [15:33:31] Echiura possibly Bonellia viridis (viridis = green) [15:33:42] LAT : 36.230066 , LON : -74.46534 , DEPTH : 1867.2666 m, TEMP : 3.62976 C, SAL : 34.94812 PSU, DO : 7.9952 mg/l [15:33:42] carolynruppel leaves the room [15:33:54] nice to have the whole thing [15:34:01] @iris, do not know yet, scott has both ideas [15:34:13] @Iris: hard to tell from this scale if it is A. arbuscula or A. scarletae [15:34:21] Hi iris [15:34:31] Sometimes diagnostic, but not in Acanella [15:34:41] this also shows the one problem with the claw and wrist arrangement... you cannot put claw flush on bottom [15:34:47] A. scarletae was named for my former grad Student Esprit Heestand Saucier's daughter Scarlet. Esprit described and named the species. [15:34:59] Acanella arbuscula et least has rootlets, if it is arbuscula with different holdfast.. it may be fun [15:35:03] When it came to the surface, the A. scarletae had a reddish tint. [15:35:11] But the key features will be at the polyp level and the sclerite distribution. [15:35:55] A. arbuscula can have roots or holdfast [15:36:06] @scott and @tina thanks for all the info. [15:36:20] Also @Tina, we have seen A. arbuscula with rootlets spread over the rock surface and then secondary calcification between them [15:36:34] So the A. scarletae is recently described [15:36:49] @Stephanie: that is correct [15:37:01] @Iris: yes: 2017 [15:37:01] heatherjudkins leaves the room [15:37:13] but it is already in WoRMS [15:37:17] this seems the A. arbuscula from the NE Atlantic but I think Esprit synonimized it if I remember correctly [15:37:46] She synonomized arbuscula and eburnea [15:38:16] LAT : 36.230082 , LON : -74.465357 , DEPTH : 1864.1477 m, TEMP : 3.63153 C, SAL : 34.94814 PSU, DO : 7.99643 mg/l [15:39:14] @scott exactly [15:40:09] starting to enter the primary part of the talus slope/debris apron at the base of the scarp [15:40:32] @Bob Carney - I had to step away and did not see the echiuran, but if it had a long proboscis with a Y-shaped end, it might be an Ochetostoma, which we get on the Miami Terrace (but in quite a bit shallower water). [15:40:41] proximal part [15:40:41] irissampaio leaves the room [15:41:55] Anthomastus [15:42:37] Chris Mah says that the sea star we saw earlier is in the genus Pythonaster [15:43:17] LAT : 36.230174 , LON : -74.465508 , DEPTH : 1855.1935 m, TEMP : 3.6296 C, SAL : 34.94852 PSU, DO : 8.0051 mg/l [15:43:42] @Chuck: it was a distinct blue color as well [15:43:55] Well he responded to my twitter screenshot :) [15:44:19] Okay, good to know Megan! [15:45:06] irissampaio leaves the room [15:45:22] Social media at it's scientific best! [15:45:36] hard hat area [15:45:50] @Scott - unlikely to be the same species given the differences in depth: 250-300 m vs 1850 m. The Miami Terrace echiuran proboscis was all green. [15:47:09] FYI: A. scarletae known from 1670−1694 m depth; A. arbuscula, which has a world-wide distribution, is known from 350−2035 m depth [15:47:45] Oh yes! Chris can wax poetic on the brisingida! [15:47:54] carolynruppel leaves the room [15:48:06] Chris has an excellent blog on this group. I'll try to find it for you [15:48:17] LAT : 36.230217 , LON : -74.465605 , DEPTH : 1849.7311 m, TEMP : 3.63231 C, SAL : 34.94839 PSU, DO : 7.99197 mg/l [15:48:49] Here is one: http://echinoblog.blogspot.com/2014/08/because-brisingid-starfish-are.html [15:49:05] in place material [15:49:23] layering visible [15:49:39] absolutely! [15:49:50] spalling failures [15:49:59] Either it increases A. scarletae depth range or it is indeed A. arbuscula [15:50:14] what are the blue things? [15:50:25] andreaquattrini leaves the room [15:50:39] things=technical term [15:50:50] @Iris: right. It is why I thought the collection was important. So far the species is known from only a couple of collections on a single cruise (not too far from where we are today) [15:51:07] blue = encrusting sponge? [15:51:13] irissampaio leaves the room [15:51:58] extreme bioerosion? [15:52:31] charlesmessing leaves the room [15:53:18] LAT : 36.230198 , LON : -74.465748 , DEPTH : 1844.562 m, TEMP : 3.63435 C, SAL : 34.94904 PSU, DO : 7.99537 mg/l [15:53:29] @Jason Appears to be. [15:54:46] New sponge for the day? [15:55:06] Some kind of demosponge. Nice. [15:55:25] @scott fantastic. I look forward to know what is this specimen [15:56:11] @Iris: Me too! :-) [15:56:48] @Iris: we need better ways to ID them in situ, if that is possible [15:58:18] LAT : 36.230138 , LON : -74.465749 , DEPTH : 1837.9647 m, TEMP : 3.63408 C, SAL : 34.94931 PSU, DO : 7.99515 mg/l [15:59:47] @scott I guess the only way would be to describe them uniquely based on external morphology. Manfred Grasshoff told me he and Frederick Bayer have agreed to do it in some specific gorgonians at the genus level [16:00:55] @Iris: the problem with that is the genetics shows us there is much convergence in morphology at that level. [16:01:32] Chrysogorgia bottlebrush form [16:03:19] LAT : 36.230218 , LON : -74.465748 , DEPTH : 1832.5874 m, TEMP : 3.63833 C, SAL : 34.94848 PSU, DO : 7.97907 mg/l [16:03:35] Likely the one we collected earlier, but an older one [16:04:03] this looks more like C. agassizi [16:04:26] It looks like it could be rooted in the sediment... [16:04:53] The sponge refers to one we saw earlier on the wall edge next to a brisingid [16:05:44] @scott yes, they did not used genetics at the time. A distinct pragmatic taxonomic approach that Manfred described here https://www.researchgate.net/publication/283734074_Taxonomy_systematics_and_octocorals_to_Frederick_M_Bayer_October_31st_2001 But also the sclerome is impossible to observe by ROV dives [16:06:09] have to step away for a while [16:06:48] @Iris: thanks. I have that paper in my office and will look at it again. [16:08:16] do these sponges bore into the rock? [16:08:30] LAT : 36.230313 , LON : -74.465647 , DEPTH : 1829.7094 m, TEMP : 3.6385 C, SAL : 34.94903 PSU, DO : 7.99922 mg/l [16:09:08] carolynruppel leaves the room [16:09:12] @Jason: good question. I wouldn't think they would need to, in terms of finding a stable substrate over which to grow. [16:09:19] irissampaio leaves the room [16:09:42] My sense of the burrowing/boring sponges is that it is a way to increase body size... [16:10:03] But here there seems to be plenty of space to expand horizontally [16:10:20] What is the slope gradient here? [16:10:38] we could lateral here at the break in slop [16:10:48] It could also be a way to protect the tissue from predators/grazers. So that would be a factor [16:11:00] within the length of the tether [16:11:25] irissampaio leaves the room [16:13:07] @Jason - Do you mean you just want to go laterally for the lenght of the tether then o up more? I think that sounds like a goo idea. [16:13:16] yes [16:13:29] LAT : 36.230082 , LON : -74.465732 , DEPTH : 1827.2819 m, TEMP : 3.63911 C, SAL : 34.94919 PSU, DO : 7.988 mg/l [16:13:41] so no ship move needed [16:14:19] roger that [16:14:25] irissampaio leaves the room [16:15:35] impressive [16:15:53] @ Sci ...filler material....that oft seen name agassiz . Father son Swiss associated with Harvard. Dad Louis was Geologist/Zoologist at Harvard and did many things "Naturalist". Son Alexander first got rich as a mining engineer then became a zoologist noted for fish expertise and deep trawling with the Survey Vessel Blake. Good rule in science...get richj 1st then be an academic. [16:16:10] CORAL [16:17:20] Bamboo coral for sure... [16:17:37] Keratoisis grayi [16:17:59] But it looks like it has nodal branching... [16:18:20] LAT : 36.230069 , LON : -74.465747 , DEPTH : 1834.4599 m, TEMP : 3.64033 C, SAL : 34.94937 PSU, DO : 7.99991 mg/l [16:18:30] So either a funky Acanella arbuscula, or an Isidella... [16:18:45] yep nodal branching... so something else [16:18:45] irissampaio leaves the room [16:19:49] I wonder if there is an overgrown skate egg csae in there... [16:20:13] Something thickened that didn't look like main stem or branch [16:20:25] agree @Scott, but think it might be J c;ade? [16:20:58] @Les: maybe, but tissue doesn't seem thick or opaque enough [16:21:03] irissampaio leaves the room [16:21:49] seems we have seen this before but since I am trying to make lunch I will have to look it up in a bit.... [16:22:06] scottfrance leaves the room [16:22:07] Isidella to me [16:22:38] @Les: it looks to have pretty long internodes... [16:22:55] In theory, Isidella should be planar... [16:23:17] taraluke leaves the room [16:23:18] @Iris: Les and I think no one actually knows what an Isidella looks like... [16:23:34] LAT : 36.230028 , LON : -74.465808 , DEPTH : 1834.9344 m, TEMP : 3.63922 C, SAL : 34.94888 PSU, DO : 7.98988 mg/l [16:23:47] The initial descriotions confused the types... [16:24:01] And there has been MUCH confusion in the literature since then [16:24:09] And I think in the end Isidella will have to be synonymized with Acanella [16:24:20] @scott and what is the type species? [16:24:43] you can see where the wall has a "fresher" surface which is maybe why this is attached here otherwise it doesn't look like a great place to live in terms of substrate strength [16:24:57] @Iris: I think I. elongata... [16:25:39] but is not Acanella branching in whorls? [16:25:54] The color and size of the polyps in combination with the overall colony shape and brancing leads me to agree with @les: J-clade [16:26:13] hint of faint layering (color change) [16:26:41] @Iris: Acanella shows at least some branching in whorls, but not all branching. So sometimes alost looks planar. [16:27:05] Looks like some fauna are desperate for a perch here! [16:27:20] irissampaio leaves the room [16:28:21]