[00:11:38] meaganputts leaves the room [10:48:01] Weather conditions are favorable this morning, and we are preparing for an on-time deployment of the ROV at 8:30 EDT. [10:49:05] We will have our pre-dive call at 8:45 EDT and expect to be on the seafloor at 1300 m depths at ~~9:15 EDT. [11:16:57] test [11:43:54] danielwagner leaves the room [11:49:09] EX1905L2_DIVE12 ROV powered off [12:17:06] EX1905L2_DIVE12 ROV Launch [12:23:40] EX1905L2_DIVE12 ROV on Surface [12:24:19] EX1905L2_DIVE12 ROV Descending [12:25:27] LAT : 39.827 , LON : -70.850964 , DEPTH : 19.8488 m, TEMP : 23.65516 C, SAL : 35.50781 PSU, DO : 6.77966 mg/l [12:30:27] LAT : 39.826715 , LON : -70.851096 , DEPTH : 98.0451 m, TEMP : 14.93892 C, SAL : 35.85483 PSU, DO : 5.14999 mg/l [12:31:19] Morning all! [12:35:28] LAT : 39.826051 , LON : -70.850923 , DEPTH : 246.4588 m, TEMP : 11.64903 C, SAL : 35.47461 PSU, DO : 4.32064 mg/l [12:40:28] LAT : 39.82514 , LON : -70.850254 , DEPTH : 397.1162 m, TEMP : 8.00349 C, SAL : 35.13084 PSU, DO : 5.17411 mg/l [12:45:29] LAT : 39.824344 , LON : -70.849889 , DEPTH : 557.7749 m, TEMP : 6.02444 C, SAL : 35.05639 PSU, DO : 6.88404 mg/l [12:50:29] LAT : 39.823946 , LON : -70.850105 , DEPTH : 710.8674 m, TEMP : 5.13194 C, SAL : 35.01968 PSU, DO : 7.69141 mg/l [12:55:30] LAT : 39.823454 , LON : -70.850156 , DEPTH : 862.8773 m, TEMP : 4.55255 C, SAL : 34.97914 PSU, DO : 8.14888 mg/l [13:00:30] LAT : 39.822802 , LON : -70.850263 , DEPTH : 1014.2478 m, TEMP : 4.36749 C, SAL : 34.96609 PSU, DO : 8.25402 mg/l [13:05:28] so many red ctenophores! [13:05:32] LAT : 39.822169 , LON : -70.850184 , DEPTH : 1101.756 m, TEMP : 4.32905 C, SAL : 34.96371 PSU, DO : 8.23731 mg/l [13:10:31] LAT : 39.821556 , LON : -70.850112 , DEPTH : 1107.4195 m, TEMP : 4.3232 C, SAL : 34.96345 PSU, DO : 8.22784 mg/l [13:15:31] LAT : 39.821195 , LON : -70.850137 , DEPTH : 1162.9977 m, TEMP : 4.28845 C, SAL : 34.96109 PSU, DO : 8.22552 mg/l [13:20:32] LAT : 39.820547 , LON : -70.850091 , DEPTH : 1259.8702 m, TEMP : 4.26523 C, SAL : 34.95884 PSU, DO : 8.23374 mg/l [13:22:57] EX1905L2_DIVE12 ROV on Bottom [13:25:32] LAT : 39.820535 , LON : -70.850168 , DEPTH : 1274.201 m, TEMP : 4.26764 C, SAL : 34.9594 PSU, DO : 8.20203 mg/l [13:30:33] LAT : 39.82058 , LON : -70.850283 , DEPTH : 1273.2163 m, TEMP : 4.26523 C, SAL : 34.9603 PSU, DO : 8.21533 mg/l [13:35:33] LAT : 39.820556 , LON : -70.850372 , DEPTH : 1270.2978 m, TEMP : 4.25631 C, SAL : 34.95922 PSU, DO : 8.21292 mg/l [13:40:34] LAT : 39.820527 , LON : -70.850527 , DEPTH : 1266.4578 m, TEMP : 4.24092 C, SAL : 34.95743 PSU, DO : 8.2123 mg/l [13:45:34] LAT : 39.820544 , LON : -70.85069 , DEPTH : 1257.2537 m, TEMP : 4.25138 C, SAL : 34.95778 PSU, DO : 8.21435 mg/l [13:50:35] LAT : 39.820539 , LON : -70.850838 , DEPTH : 1248.9628 m, TEMP : 4.21659 C, SAL : 34.95993 PSU, DO : 8.20154 mg/l [13:55:35] LAT : 39.820538 , LON : -70.851183 , DEPTH : 1239.6336 m, TEMP : 4.25598 C, SAL : 34.95932 PSU, DO : 8.19137 mg/l [14:00:36] LAT : 39.820415 , LON : -70.851385 , DEPTH : 1228.7785 m, TEMP : 4.26299 C, SAL : 34.95875 PSU, DO : 8.19789 mg/l [14:05:36] LAT : 39.820372 , LON : -70.851593 , DEPTH : 1218.9944 m, TEMP : 4.2568 C, SAL : 34.95952 PSU, DO : 8.19793 mg/l [14:09:30] Good morning folks! [14:10:20] I do keep telling my students and seminar attendees that most of the deep seafloor is covered by sediments, but you don't have to keep proving it! :-) [14:10:36] on my behalf [14:10:38] LAT : 39.82028 , LON : -70.851759 , DEPTH : 1207.216 m, TEMP : 4.26474 C, SAL : 34.95882 PSU, DO : 8.20783 mg/l [14:12:01] ok, scott :P [14:15:37] LAT : 39.82036 , LON : -70.852043 , DEPTH : 1197.5019 m, TEMP : 4.27082 C, SAL : 34.96049 PSU, DO : 8.18387 mg/l [14:16:14] found you some rock [14:17:08] :-) [14:20:38] LAT : 39.820343 , LON : -70.852035 , DEPTH : 1195.8843 m, TEMP : 4.26923 C, SAL : 34.95955 PSU, DO : 8.1848 mg/l [14:21:15] Loks like sticky clay [14:23:11] I wouldn't expect that to be sticky Scott. Way too consolidated, pretty much rock without chemical cementation. [14:24:17] probably not a good substrate for corals though [14:25:38] LAT : 39.820374 , LON : -70.85189 , DEPTH : 1188.1273 m, TEMP : 4.27191 C, SAL : 34.96017 PSU, DO : 8.16902 mg/l [14:30:39] LAT : 39.82027 , LON : -70.852339 , DEPTH : 1178.2566 m, TEMP : 4.26589 C, SAL : 34.96083 PSU, DO : 8.17591 mg/l [14:31:04] This sponge is a good illustration that the sediment tumbles downslope (and so collects on top of the sponge). [14:32:30] @Jeff: I meant that the scraped texture looked to me like wet fine particle sediment (clay) that in my experience is sticky. Or maybe better would be slippery! [14:34:56] The surface would be wet, but the interior I would expect to be pretty dry due to being so consolidated. It wouldn't have the mechanical strength to not crumble under D2's weight otherwise [14:35:39] LAT : 39.820337 , LON : -70.852368 , DEPTH : 1176.9454 m, TEMP : 4.26173 C, SAL : 34.96032 PSU, DO : 8.18353 mg/l [14:40:40] LAT : 39.820257 , LON : -70.852248 , DEPTH : 1179.9128 m, TEMP : 4.25806 C, SAL : 34.95973 PSU, DO : 8.18655 mg/l [14:41:34] Never speak too soon! [14:44:30] NOthing wrong with sediment...it keeps me employed :-) [14:45:16] Jason, I was allowed an entire 15 minutes to play with rocks and dirt on this dive, I consider myself fortunate :P [14:45:40] LAT : 39.820279 , LON : -70.852284 , DEPTH : 1182.4992 m, TEMP : 4.25839 C, SAL : 34.95953 PSU, DO : 8.17289 mg/l [14:46:43] don't play too hard, this area has a long area of sliding downhill [14:50:41] LAT : 39.820198 , LON : -70.852474 , DEPTH : 1173.4214 m, TEMP : 4.26255 C, SAL : 34.95691 PSU, DO : 8.17476 mg/l [14:50:57] Baby Bathypathes [14:52:17] Not sure if you've used this bit of trivia already: I think black corals are the only hexacorals that actually have only 6 tentacles. All the others have multiples of 6 (or thereabout) [14:55:34] Nice little bamboo coral.Couldn't tell if the branch was arising from a node or not. [14:55:41] LAT : 39.820164 , LON : -70.852378 , DEPTH : 1172.8831 m, TEMP : 4.26737 C, SAL : 34.95561 PSU, DO : 8.1824 mg/l [14:57:30] Some other scrawny fan on the right rock [14:57:54] i think internode, but it was very small and hard to see even with full zoom [14:58:40] Lots of mucus netting on the surface of the rock [14:59:06] do you know where that muscus comes from? [15:00:08] Not certain. Could be worms, corals, sponges, aneomnes...! [15:00:42] LAT : 39.820226 , LON : -70.852447 , DEPTH : 1170.2595 m, TEMP : 4.26239 C, SAL : 34.96041 PSU, DO : 8.17645 mg/l [15:01:05] We've seen this octopus behavior before on our previous expedition to these canyons. Good rock climibers! [15:02:11] I think I see the suckers are arranged in a single row along the arm, which is helpful information for IDs. [15:03:53] @Jeff: Cephalopod one-upmanship. Quasi-sibling rivalry. [15:05:42] LAT : 39.820222 , LON : -70.852534 , DEPTH : 1168.3659 m, TEMP : 4.26825 C, SAL : 34.95945 PSU, DO : 8.17703 mg/l [15:06:55] Maybe you'll find octopus grottoes on this dive. [15:08:28] I'm guessing this is a Paramuricea... [15:08:56] ...based on shape, color, and the presence of that ophiuroid [15:09:58] That positioning suggests perhaps "she" is sitting on eggs. [15:10:43] LAT : 39.820202 , LON : -70.852549 , DEPTH : 1164.8992 m, TEMP : 4.28226 C, SAL : 34.96065 PSU, DO : 8.15563 mg/l [15:11:43] This looks different from a distance. maybe Acanthogorgia? [15:12:20] Yes, definitely Acanthogorgia. [15:12:39] If it has aplacophorans on it, this would be a good collection! [15:12:52] Not sure aplacs have been collected from up here before. [15:15:00] Thanks Meagan. I'm sending aplacophorans from Emperors to Kevin Kocot at U Alabama who has a group working on genetics and taxonomy of them. I'll let him know of this collection. [15:15:42] I will count the aplacophorans as the main specimen [15:15:44] LAT : 39.820117 , LON : -70.852553 , DEPTH : 1164.6373 m, TEMP : 4.28275 C, SAL : 34.9617 PSU, DO : 8.14859 mg/l [15:18:30] @Meagan: sounds good. Two species of Acanthogorgia known from this area: A. armata looks to be more common based on my database, but all my collections are from the offshore seamounts, not the canyons, so the coral will also be a valuable addition. [15:20:44] LAT : 39.82019 , LON : -70.852555 , DEPTH : 1164.7493 m, TEMP : 4.32413 C, SAL : 34.96655 PSU, DO : 8.1442 mg/l [15:25:44] LAT : 39.820363 , LON : -70.852585 , DEPTH : 1162.1831 m, TEMP : 4.30519 C, SAL : 34.96294 PSU, DO : 8.14228 mg/l [15:29:16] fishes seen to this point: Ophidiididae with long sensory pectoral filaments = Dicrolene intronigra; small translucent fish = Paraliparis sp.; slender cutthroat eel zoomed in on = Synaphobranchus affinis; right-eyed flounder with white margined pectoral fin = Witch Flounder, Glyptocephalus cynoglossus; entirely black cod-like fish with pointed snout cruising close to substrate = Anitmora rostrata. Also seen without close-up = halosaur Aldrovandia; macrourid Nezumia bairdii. [15:30:45] LAT : 39.820192 , LON : -70.852384 , DEPTH : 1167.3001 m, TEMP : 4.30623 C, SAL : 34.96148 PSU, DO : 8.13916 mg/l [15:31:40] Thick bottom ooze here is good biotope for many benthic and benthopelagic fishes; unnoticed in ROV dives are all the abundant tiny benthic epifaunal and infaunal invertebrates that are good food resources for fishes. Big contrast to rocky bottom that is generally food-poor for fishes. [15:31:44] Thanks Ken! [15:34:36] OE needs a complimentary 'small-stuff' vehicle, a benthic crawler (crab-like walker with close-up cam and lights suspended below) or benthic mini-track vehicle with same imaging capability. We like the big, colorful, and mobile - but that is only a part of the overall diversity in the deep-sea. Time to think small [15:35:45] LAT : 39.819989 , LON : -70.85255 , DEPTH : 1170.8077 m, TEMP : 4.28478 C, SAL : 34.96102 PSU, DO : 8.15425 mg/l [15:36:36] @Ken: time to work on some emerging technology... [15:40:46] LAT : 39.819825 , LON : -70.85251 , DEPTH : 1173.2091 m, TEMP : 4.28456 C, SAL : 34.96111 PSU, DO : 8.15814 mg/l [15:45:46] LAT : 39.819591 , LON : -70.852357 , DEPTH : 1173.8099 m, TEMP : 4.26173 C, SAL : 34.9597 PSU, DO : 8.17489 mg/l [15:45:49] Long-finned hake, Phycis chesteri, and red crab Chaecon quinquidens, and several other demersal deep-slope fishes excavate and occupy burrows into this type of mudstone. It is very much like consolidated clay when sampled [15:50:47] LAT : 39.819555 , LON : -70.852424 , DEPTH : 1172.5411 m, TEMP : 4.2568 C, SAL : 34.95982 PSU, DO : 8.17766 mg/l [15:55:17] This also shows why we need to "ground truth" models with observations! [15:55:30] As you say, the type of substrate is very important. [15:55:47] LAT : 39.819532 , LON : -70.852375 , DEPTH : 1173.9057 m, TEMP : 4.25204 C, SAL : 34.95846 PSU, DO : 8.17779 mg/l [16:00:48] LAT : 39.819345 , LON : -70.852459 , DEPTH : 1169.0513 m, TEMP : 4.25538 C, SAL : 34.95951 PSU, DO : 8.16395 mg/l [16:05:48] LAT : 39.819349 , LON : -70.852386 , DEPTH : 1168.0611 m, TEMP : 4.25587 C, SAL : 34.95971 PSU, DO : 8.1666 mg/l [16:08:30] I think I just pulled a muscle trying to repeat thta. [16:10:11] lol [16:10:48] LAT : 39.819246 , LON : -70.852514 , DEPTH : 1166.2034 m, TEMP : 4.25746 C, SAL : 34.95981 PSU, DO : 8.15877 mg/l [16:15:49] LAT : 39.81913 , LON : -70.852322 , DEPTH : 1168.1579 m, TEMP : 4.25472 C, SAL : 34.95958 PSU, DO : 8.15898 mg/l [16:17:07] jasonchaytor leaves the room [16:20:49] LAT : 39.819227 , LON : -70.852589 , DEPTH : 1171.7827 m, TEMP : 4.25905 C, SAL : 34.96012 PSU, DO : 8.16866 mg/l [16:23:18] It is "yeti-like" with those fuzzy arms. [16:23:35] There must be lots of setae on those arms to bind up the sediment like that. [16:25:50] LAT : 39.819099 , LON : -70.8523 , DEPTH : 1171.4317 m, TEMP : 4.25806 C, SAL : 34.95906 PSU, DO : 8.17397 mg/l [16:26:14] scott, Id on this? [16:26:59] small primnoid of some kind [16:27:07] Agree primniod, but not certain beyond that. [16:27:27] Will do a quick search in database [16:27:31] collect? [16:28:47] Could it be a small Candidella? [16:29:00] Sure - collect. [16:29:18] dont think candidella [16:30:50] LAT : 39.8191 , LON : -70.852398 , DEPTH : 1170.1114 m, TEMP : 4.25937 C, SAL : 34.9619 PSU, DO : 8.1668 mg/l [16:32:22] Searching through all the primnoids we've collected in the Atlantic, I still come up with Candidella imbricata as my best guess. If thta is what it is, it is a young colony. [16:33:03] But that is based on just the brief view I had. I didn't see a good close up. (not because you didn't take one but because I am not wathcing 100%) [16:33:28] If you find it has worm tunnels on it, that will be a dead giveaway that it is Candidella imbricata. [16:34:50] But maybe it is too small for the worms to have colonized yet... [16:34:52] it is very small didn't see worm tunnels [16:35:07] it is interesting [16:35:51] LAT : 39.819067 , LON : -70.852304 , DEPTH : 1170.7328 m, TEMP : 4.26031 C, SAL : 34.95955 PSU, DO : 8.15847 mg/l [16:36:18] My first thought on the thin skinny branches was that it was Thouarella (maybe hilgendorffi) but the close-up didn't look right. [16:37:17] my thought too [16:38:34] and this is the first primnoid we have collected [16:39:21] Wow. That is unusual for a Family that is so diverse and widespread in the deep sea! [16:40:45] we haven't been seeing too many primnoids during this expedition, which I thought was weird [16:40:51] LAT : 39.818983 , LON : -70.852316 , DEPTH : 1170.7531 m, TEMP : 4.26255 C, SAL : 34.95999 PSU, DO : 8.14986 mg/l [16:41:13] the most was two days ago a Veatch with the Calyprophora and Thouarella [16:42:31] Amazing you haven't seen any Primnoa resedaeformis on this expedition. [16:45:52] LAT : 39.819029 , LON : -70.852443 , DEPTH : 1170.2114 m, TEMP : 4.25664 C, SAL : 34.95972 PSU, DO : 8.1668 mg/l [16:50:15] It might be worth stating that sea spiders are not arachnids. [16:50:26] You are ahead of me! [16:50:52] LAT : 39.818852 , LON : -70.852366 , DEPTH : 1172.2924 m, TEMP : 4.25729 C, SAL : 34.96049 PSU, DO : 8.16213 mg/l [16:51:19] Ovigers [16:51:32] Or ovigerous legs [16:53:16] Ophidioid, cusk-eel, zoomed in on a few minutes ago = genus Neobythites [16:53:58] thanks Ken! I guessed Monomitopus... [16:54:21] Chrysogorgia - chryso means gold in Latin or Greek [16:55:08] One you have said many times and forgt when on the spot: Antipathes! [16:55:53] LAT : 39.818889 , LON : -70.852416 , DEPTH : 1165.5295 m, TEMP : 4.26063 C, SAL : 34.95947 PSU, DO : 8.16111 mg/l [16:57:41] Monomitopus is very similar, but with a smaller eye proportionally, and not with such a distinct lateral line. Today's fish also had a second accessory series of lateral line organs arrayed just below the dorsal fin. Have not seen that in species of Neobythites previously. Interesting fish for further inquiry [16:59:58] very cool, thanks for the good info! we got a lot og good imagry of that cuskeel [17:00:16] So - in keeping with the ongoing discourse on meaning of scientific names. Monomitopus means a single-thread, referring to the diagnostic feature of the cusk eel with that genus name. Most cusk-eels have two-rayed pelvic fins, but Monomitopus has only a single ray in each pelvic fin [17:00:53] LAT : 39.818915 , LON : -70.852556 , DEPTH : 1156.6848 m, TEMP : 4.26458 C, SAL : 34.96015 PSU, DO : 8.15562 mg/l [17:03:48] If you want more Latin examples for a later lull, I pulled these from my student Eric Pante's paper describing new Chrysogorgia from the New England and Corner Seamounts: Chrysogorgia tricaulis: Species epithet is Latin for ‘three passages’ (tri and caulus in combination) in reference to the large passageways visible when the colony is viewed from below; Chrysogorgia artospira Species epithet is Latin for ‘tight spiral’ (arto and spira combined) in reference to the 2/5 branching sequence, the tightest spiral for any colony of Chrysogorgia observed on the NES and CS; Chrysogorgia averta Species epithet is Latin for ‘saddle bag’, in reference to the morphology of mature polyps, with their two ‘pockets’, containing eggs and extending below each side of the branch. [17:05:20] You could also use Cnidaria, where cnida is a thin thread referring to the nematocyst; Anthozoa translates as flower animal for the polyps. [17:05:54] LAT : 39.818828 , LON : -70.85256 , DEPTH : 1154.0531 m, TEMP : 4.26282 C, SAL : 34.96028 PSU, DO : 8.16138 mg/l [17:05:56] Sponge nerd puns. [17:06:31] I'm sad this is the last dive - I wasn't able to watch much this expedition due to fieldwork! [17:06:51] Were there (m)any bryozoans? [17:07:17] we saw somm really cool yellow fan-shaped ones! [17:08:44] kennethsulak leaves the room [17:09:17] @Meagan oh that's right - I saw some of those on the dive I watched the other day! Were there any other kinds? [17:09:44] there were a couple [17:09:57] But I think upside-down jellyfish are just shallow water animals. They live upside down to expose symbiotic algae to sun. I think the benthic jellies down here grab the substrate subumbrellar side down. [17:10:54] LAT : 39.818867 , LON : -70.852694 , DEPTH : 1149.921 m, TEMP : 4.26474 C, SAL : 34.96004 PSU, DO : 8.15262 mg/l [17:10:56] Good speculation. I noticed some small clumps of dead, weathered Lophelia in crevices during this dive [17:15:44] Lessons from today's dive and preceding dives: Not all hard substrate if functionally equivalent. Not all steep slope is functionally suitable as attached epifauna biotope. Even when ideal physically, there are two other necessary long-term factors essential to the survival over decades or centuries for corals and sponges: high productivity in the overlying watermass & persistence of bottom currents over time to deliver sufficient and continuous over time supply of particulate matter and plankton [17:15:55] LAT : 39.81884 , LON : -70.852761 , DEPTH : 1133.0137 m, TEMP : 4.26447 C, SAL : 34.96034 PSU, DO : 8.16284 mg/l [17:19:38] Looks Acanthogorgia like from a distance [17:20:47] Yes, Acanthogorgia for sure. [17:20:55] LAT : 39.818701 , LON : -70.852714 , DEPTH : 1138.2897 m, TEMP : 4.26682 C, SAL : 34.96052 PSU, DO : 8.14347 mg/l [17:21:43] Looks like the underlying geology may have failed... [17:21:54] still attached to holdfast [17:22:55] suspect trawl marks/gouge along wall broke the coral holdfast off the cliff face [17:23:01] Too bad there weren't any. An already dislodged coral is a good collection opportunity. [17:24:32] there might be some. it was a big colony... [17:25:56] LAT : 39.81873 , LON : -70.852711 , DEPTH : 1136.3969 m, TEMP : 4.26589 C, SAL : 34.96063 PSU, DO : 8.1798 mg/l [17:26:25] Good call on the collection. Likely lots of good stuff in there. [17:28:18] so much stuff... we will have our work cut out for us tonight but it is totally worth it [17:28:58] but it is the last dive, I can sleep in tomorrow [17:29:06] kennethsulak leaves the room [17:30:31] Indeed! [17:30:52] Took me more than a week to recover my sleep after getting back from Emperors. [17:30:56] LAT : 39.818759 , LON : -70.852758 , DEPTH : 1138.0443 m, TEMP : 4.26124 C, SAL : 34.96014 PSU, DO : 8.16437 mg/l [17:31:57] This will also be a very exciting and useful collection for my doctoral student Jaymes Awbrey, who is studying the evloution of the family Acanthogorgiidae and the genus Acanthogorgia. Every sample adds more to our knowledge of distribution and diversification. [17:33:02] do you know the growth rate of Acanthogorgia? [17:35:04] I do not. Don't believe anyone has ever tried to age one. [17:35:40] There are many shallow water species so perhaps some growth work has been done on tropical Pacific reefs. [17:35:57] LAT : 39.81872 , LON : -70.852711 , DEPTH : 1138.1342 m, TEMP : 4.26414 C, SAL : 34.96053 PSU, DO : 8.13904 mg/l [17:36:01] Too bad Jaymes is not on today - he might know. [17:37:42] Given the amount of sediment we see in this canyon, that coral would likely have been buried and not survived. [17:38:59] i was just thinking it was a very large colony and is proababy very old [17:40:57] LAT : 39.818836 , LON : -70.85279 , DEPTH : 1135.9655 m, TEMP : 4.2694 C, SAL : 34.96035 PSU, DO : 8.16394 mg/l [17:45:58] LAT : 39.818671 , LON : -70.852801 , DEPTH : 1121.3076 m, TEMP : 4.25965 C, SAL : 34.9603 PSU, DO : 8.15089 mg/l [17:50:58] LAT : 39.818867 , LON : -70.852908 , DEPTH : 1115.4016 m, TEMP : 4.26397 C, SAL : 34.96055 PSU, DO : 8.18898 mg/l [17:52:58] I think I see a very small bamboo coral whip growing just below and to left of this Clavularia. In front of Acesta bivalve. [17:54:01] Is that small isidid growing from the bivalve? [17:54:14] Or from the rock next to the bivalve? [17:55:28] I wonder if some of these "scour" marks could have been formed by dissolution from water moving through it when it was more solid. That is, these are remnants of internal tubes/pipes/channels and not scratches in the rock after it was exposed... [17:55:58] LAT : 39.818741 , LON : -70.852875 , DEPTH : 1115.4269 m, TEMP : 4.27049 C, SAL : 34.95953 PSU, DO : 8.15718 mg/l [17:57:11] That's a possibility. I've got some carbonate folks who can help us. [17:57:20] The isidid is on the bivalve in the center, just below the ledge... [17:57:42] Bright white, unbranched, on right side of bivalve. [17:58:55] ROV graffitti tag... [18:00:16] Before you leave, you are in a perfect posiiton to zoom on that bamboo whip. Just trying to determine what it is attached to. [18:00:41] Directly below the scrape [18:00:59] LAT : 39.818881 , LON : -70.852833 , DEPTH : 1115.294 m, TEMP : 4.26907 C, SAL : 34.96056 PSU, DO : 8.14438 mg/l [18:04:11] We'll likely see it is attached to the rock next to it. [18:05:15] Wow. Interesting. [18:05:27] I would suggest this larva did not pick a good place to settle. [18:05:50] As it grows it will likely pull the shell off the wall. [18:05:59] LAT : 39.818789 , LON : -70.85293 , DEPTH : 1114.7304 m, TEMP : 4.2608 C, SAL : 34.96028 PSU, DO : 8.14471 mg/l [18:06:01] lol. [18:06:06] True dat. [18:07:01] Another way I "test" the stability of these canyon walls is to look at how much and how big the sessile fauna growing on it is. Where the wall is crumbly and prone to failure, stuff won't survive to grow too large. We've seen that in other canyons. [18:07:18] My wife points out that some corals may prefer a mobile home property... [18:08:10] lol! [18:09:12] Good tests. [18:10:36] this harder layer is a potentially mappable layer across neighboring canyons. [18:10:50] Perhaps an Actinerus anemone just below the brisingid [18:11:00] LAT : 39.818776 , LON : -70.85288 , DEPTH : 1112.7504 m, TEMP : 4.26896 C, SAL : 34.96052 PSU, DO : 8.13529 mg/l [18:11:03] Novodinia star [18:11:17] @Barry: agree. I've definitely seen these layers in other NE canyons [18:12:38] A bamboo coral again... [18:12:45] Jiust like the one we saw below. [18:13:28] To the leftmost Acesta are live polyps [18:13:41] So the colony isn't dead, though getting crowded out! [18:14:15] Ooohhhh There's a Brisingid on a bamboo coral on a fire scallop on some carbonate in a canyon at the bottom of the sea! [18:14:50] @Noal: nice one! [18:15:02] sorry: Nolan [18:15:13] @Scott :-D [18:15:38] Or maybe that ledge is the upper part of the wall that collapsed, and all their buddies took a tumble downslope... [18:16:00] LAT : 39.818858 , LON : -70.852924 , DEPTH : 1113.3004 m, TEMP : 4.27843 C, SAL : 34.95984 PSU, DO : 8.1438 mg/l [18:17:22] Maybe Telopathes... [18:18:05] Telopathes magna looks like a big Bathypathes with the side pinnules branched. [18:19:20] FYI, from the other side of the pond: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0079917 [18:19:41] @Meagan And its very odd that Antipatharia have very few medicinally active compounds. Or at least there's not much published in literature. This is a chemical ecology topic that I am really interested in investigating. Maybe for an NSF GRFP. [18:19:50] Parantipathes [18:21:01] LAT : 39.818796 , LON : -70.852887 , DEPTH : 1111.2108 m, TEMP : 4.27191 C, SAL : 34.96137 PSU, DO : 8.14049 mg/l [18:21:48] Since we were talking about Latin, the etymology for black coral Telopathes: Derived from the Latin telum (dart), in reference to the shaft and flights of a dart and the general shape of the corallum, and the commonly used suffix pathes [18:23:02] There must be an octopus back in there somewhere... on eggs. [18:23:21] Its plump. [18:23:37] Kinds looks draped on the couch. [18:24:38] Caprellid amphipod to lower left of seastar [18:25:33] This was the sort of "grotto" we commonly saw octopus brooding back in 2014 [18:26:01] LAT : 39.818736 , LON : -70.852834 , DEPTH : 1109.509 m, TEMP : 4.27126 C, SAL : 34.96079 PSU, DO : 8.14458 mg/l [18:27:34] FYI, the reason I sent the link to you earlier was to highlight the similarity in canyon communities on both sides of the Atlantic. From the paper abstract: "the assemblage included the solitary coral Desmophyllum dianthus, cerianthid anemones, comatulid crinoids". I haven't noticed cerianthids (yet) but definitely the cup corals, crinoids and brisingids. [18:28:44] i saw some at the beginning of the dive [18:28:55] didnt get a good look a one though [18:29:32] For octopus grotto, check out geology highlight #2 on this page: https://oceanexplorer.noaa.gov/okeanos/explorations/ex1404/logs/oct5/oct5.html [18:30:24] There are almost always a pair of chirostylids on these Parantipathes [18:30:25] collect? [18:30:35] We have collect several from NES... [18:30:51] Stand by and I'll check database for canyons [18:31:02] LAT : 39.818669 , LON : -70.85284 , DEPTH : 1103.1382 m, TEMP : 4.27334 C, SAL : 34.96076 PSU, DO : 8.13911 mg/l [18:31:07] No, I meant from New England Seamounts, not canyons [18:31:58] Crabs are in the genuc Uroptychus [18:32:04] *genus [18:35:35] So to clarify earlier... Parantipathes (and their chirostylids) in Atlantic collections I have been involved with... Only one from a canyon, that being Little Abaco Canyon Bahamas, well south of here. Then 28 collections from the New England Seamounts. [18:35:48] i though that they were Uroptychus but Mary was saying that chirostylid have been going though a lot of revision lately [18:36:02] LAT : 39.818737 , LON : -70.852918 , DEPTH : 1101.6348 m, TEMP : 4.26907 C, SAL : 34.96138 PSU, DO : 8.1338 mg/l [18:36:58] Very elegant purple trim that the Acesta have decorated the walls with... [18:38:29] But Clavularia will gladly grow on dead coral skeleton [18:38:49] still doesnt count as stealing [18:40:47] Based on what you said, is there no midwater component today? The table in the email suggests a midwater component to start about now. Perhaps that was the original plan? [18:41:03] LAT : 39.818712 , LON : -70.852846 , DEPTH : 1099.1998 m, TEMP : 4.3047 C, SAL : 34.96231 PSU, DO : 8.12698 mg/l [18:41:38] no midwater today [18:43:15] Copy [18:45:17] Maybe a Swiftia down below [18:45:31] on the edge of that ledge [18:46:03] LAT : 39.818753 , LON : -70.852887 , DEPTH : 1094.2554 m, TEMP : 4.30853 C, SAL : 34.96396 PSU, DO : 8.55486 mg/l [18:46:15] do you know the dialing is going out on internet? [18:48:09] That fish's eyes are definitely bigger than its belly, as my grandmother would say. [18:51:04] LAT : 39.81871 , LON : -70.852841 , DEPTH : 1091.7187 m, TEMP : 4.29879 C, SAL : 34.96236 PSU, DO : 8.47545 mg/l [18:52:23] Scott, since there has been only one collection of this parantipathes in canyons, should we collect this? [18:52:43] That would be fine by me. [18:53:05] I don't imagine we are going to find a lot of collection targets in the last hour. [18:53:34] It would be a collection for pop genetics, not really for ID, since we are pretty sure what it is. [18:56:04] LAT : 39.818761 , LON : -70.852894 , DEPTH : 1095.4804 m, TEMP : 4.29928 C, SAL : 34.96177 PSU, DO : 8.41051 mg/l [19:01:05] LAT : 39.818757 , LON : -70.85283 , DEPTH : 1095.1614 m, TEMP : 4.29595 C, SAL : 34.9624 PSU, DO : 8.35157 mg/l [19:05:24] cliff top at ~~1100 m [19:06:05] LAT : 39.818759 , LON : -70.852849 , DEPTH : 1093.2472 m, TEMP : 4.281 C, SAL : 34.96118 PSU, DO : 8.32709 mg/l [19:11:06] LAT : 39.818775 , LON : -70.852784 , DEPTH : 1092.1158 m, TEMP : 4.29261 C, SAL : 34.96161 PSU, DO : 8.24962 mg/l [19:12:27] That lower yellow one looks different from the earlier Paramuricea we saw. [19:12:49] And I couldn't see an ophiuroid, so I wonder if it is not a Paramuricea. [19:13:58] Small Acathogorgia in front of Paragorgia [19:15:53] Can we descend to the yellow colony down the wall below the Paragorgia? [19:16:06] LAT : 39.818816 , LON : -70.852831 , DEPTH : 1095.1123 m, TEMP : 4.29852 C, SAL : 34.962 PSU, DO : 8.25099 mg/l [19:16:50] Jaymes Awbrey - if you were looking for his name [19:17:52] thanks [19:19:47] I think there are actually 2 or 3 stem axes here... [19:19:58] The Acanthogorgia may be growing on one [19:20:23] This is probably P. arborea [19:21:07] LAT : 39.818831 , LON : -70.852846 , DEPTH : 1095.4269 m, TEMP : 4.2937 C, SAL : 34.96266 PSU, DO : 8.22634 mg/l [19:21:42] Can we descend to the yellow colony down the wall below the Paragorgia? [19:22:00] Maybe 1 or 2 meters down [19:22:04] can do [19:22:52] @Meagan: you noted it as we were flying in to wall. [19:23:24] My video has gotten very choppy/intermittant. Could be my connection. [19:24:07] Looks like another Acanthogorgia. so that taxon is well represented in this canyon. [19:24:50] Thanks for following up on that. [19:26:07] LAT : 39.818833 , LON : -70.852824 , DEPTH : 1097.9522 m, TEMP : 4.28927 C, SAL : 35.14147 PSU, DO : 8.22094 mg/l [19:26:16] Quite fascinating to think about how the Clavularia larva first choose a place to settle. Once gthey have though the ribbon-like growth appears to follow the local mini-topographic high ridge lines aloing the wall [19:26:32] That is shown very nicely here. [19:31:08] LAT : 39.818839 , LON : -70.852859 , DEPTH : 1097.6091 m, TEMP : 4.29802 C, SAL : 34.96164 PSU, DO : 8.18643 mg/l [19:32:35] These must be Telopathes magna. [19:33:33] Here is something APPROPRIATE: Holotype. NSMC 17671, Western North Atlantic, Nova Scotia continental slope, near the mouth of the Laurentian Channel, 44.428098 N, 57.173328 W, depth 1073 m. [19:33:45] Holotype with subsamples archived in the Nova Scotia Museum Collection, Halifax, Nova Scotia, Canada. [19:34:05] So this species ties us back to the start of the expedition! [19:34:12] in Halifax! [19:34:45] Holotype is from almost the exact depth we are at now. [19:36:08] LAT : 39.818842 , LON : -70.852862 , DEPTH : 1099.5366 m, TEMP : 4.29802 C, SAL : 34.96241 PSU, DO : 8.18999 mg/l [19:37:29] Aw man, the bittersweet feeling of the last dive of an expedition. Bummed that I missed so much (labwork, classwork, and building IKEA furniture today). But every moment I have seen has been extraordinary! I am excited for the next expedition!!! Thank you Meagan, Jeff, and Daniel for leading a fantastic expedition! THANK YOU GFOE and OKEX CREW FOR MAKING THIS POSSIBLE!!!!! [19:38:00] Congratulations Meagan and Jeff for excellent commentary and to entire crew for their continued efforts to bring us these magnificant images. [19:38:36] And another bittwersweet ending: Dan's last dive with OEX. You'll be missed Dan! [19:38:57] Umbella against tumbling sediments! [19:39:20] *Umbrella [19:39:30] Can't end the expedition on a typo! [19:39:54] Good observation Meagan. [19:39:59] @Scott He will be for sure! Where's he going on to next? [19:40:41] I forget the organization, buut it is a conservation group. [19:41:09] LAT : 39.818835 , LON : -70.852834 , DEPTH : 1095.2789 m, TEMP : 4.28943 C, SAL : 34.96547 PSU, DO : 8.20213 mg/l [19:41:11] @Scott Gotcha. [19:41:13] @Nolan: Conservation International [19:41:28] meganmcculler leaves the room [19:41:30] @Dan CONGRATULATIONS AND BEST OF LUCK!!!! [19:41:39] @Nolan he be leading a new effort aimed at establishing marine conservation areas on the high seas. So, important work [19:41:52] EX1905L2_DIVE12 ROV Ascending [19:41:55] @Meagan and @Jeff I most especially will miss the puns! [19:41:59] *He will be leading... [19:42:08] As I said, no typos at the end! [19:42:13] See you all. Safe travels home. [19:42:16] @Scott That's AWESOME!!! [19:42:25] Safe travels everyone!!!! [19:42:55] @Meagan Lovely language as usual! [19:42:59] Except the current wall in the Emperors! :-) [19:43:05] lol [19:43:09] Bye all. [19:43:20] Bye! [19:43:49] Bye guys! Thanks for helping with the bio :D [19:44:19] barryeakins leaves the room [19:44:26] Bye!!! hope to be you science lead again some time in the future [19:46:09] LAT : 39.818961 , LON : -70.853153 , DEPTH : 1082.3712 m, TEMP : 4.30377 C, SAL : 34.96222 PSU, DO : 8.1745 mg/l [19:46:15] Ack! Forgot to thank the wonderful mappers! THANK YOU MAPPING TEAM! [19:46:19] and since I can't end on a typo either... [19:46:34] see you in the chat during other expeditions! [19:46:37] @Meagan Please say hi to Mike White for me! [19:46:46] I will :) [19:47:04] @Meagan Thanks! Safe travels and chat with you soon! [19:47:06] nolanbarrett leaves the room [19:47:21] scottfrance leaves the room [19:47:32] meaganputts leaves the room [19:49:36] jeffreyobelcz leaves the room [19:51:10] LAT : 39.818801 , LON : -70.853284 , DEPTH : 949.4197 m, TEMP : 4.40165 C, SAL : 34.9684 PSU, DO : 8.12639 mg/l [19:56:10] LAT : 39.818677 , LON : -70.853048 , DEPTH : 796.1775 m, TEMP : 4.81297 C, SAL : 34.99824 PSU, DO : 7.81267 mg/l [19:56:58] danielwagner leaves the room [20:01:11] LAT : 39.818384 , LON : -70.852321 , DEPTH : 644.4197 m, TEMP : 5.4625 C, SAL : 35.03011 PSU, DO : 7.21077 mg/l [20:06:11] LAT : 39.817893 , LON : -70.851583 , DEPTH : 502.5994 m, TEMP : 6.42353 C, SAL : 35.06991 PSU, DO : 6.36568 mg/l [20:11:12] LAT : 39.817192 , LON : -70.851063 , DEPTH : 359.2844 m, TEMP : 8.07276 C, SAL : 35.13087 PSU, DO : 5.12626 mg/l [20:15:15] jeffreyobelcz leaves the room [20:16:12] LAT : 39.816772 , LON : -70.850887 , DEPTH : 224.0036 m, TEMP : 11.65079 C, SAL : 35.47516 PSU, DO : 4.39179 mg/l [20:21:13] LAT : 39.816603 , LON : -70.850267 , DEPTH : 74.192 m, TEMP : 15.80648 C, SAL : 35.88013 PSU, DO : 5.28107 mg/l [20:24:41] chat-admin leaves the room [20:26:13] LAT : 39.816886 , LON : -70.849524 , DEPTH : 50.1199 m, TEMP : 19.88333 C, SAL : 35.66492 PSU, DO : 6.18049 mg/l [20:31:14] LAT : 39.817094 , LON : -70.848627 , DEPTH : 50.2384 m, TEMP : 19.85512 C, SAL : 35.66469 PSU, DO : 6.16441 mg/l [20:36:14] LAT : 39.817676 , LON : -70.848103 , DEPTH : 50.5019 m, TEMP : 20.52748 C, SAL : 35.65055 PSU, DO : 6.19974 mg/l [20:41:15] LAT : 39.817457 , LON : -70.847687 , DEPTH : -22.486 m, TEMP : 23.63035 C, SAL : 35.50295 PSU, DO : 6.78045 mg/l [20:42:29] EX1905L2_DIVE12 ROV on Surface [21:03:14] EX1905L2_DIVE12 ROV Recovery Complete