[00:05:01] scottfrance leaves the room [00:40:39] dereksowers leaves the room [09:41:32] EX2203_DIVE04 TEST MESSAGE [09:45:30] EX2205_DIVE04 ROV powered off [10:03:46] Good morning everyone. We are on station and the weather loks good. Vehicles will be launched shortly. [10:17:06] cindyvandover leaves the room [10:28:02] EX2205_DIVE04 ROV Launch [10:35:33] EX2205_DIVE04 ROV on Surface [10:36:54] EX2205_DIVE04 ROV Descending [10:38:16] LAT : 43.154308 , LON : -29.01852 , DEPTH : 28.7697 m, TEMP : 18.36538 C, SAL : 35.97061 PSU, DO : 8.0637 mg/l, TURBIDITY : 0.9096 FTU [10:43:17] LAT : 43.153866 , LON : -29.01938 , DEPTH : 50.9302 m, TEMP : 16.09194 C, SAL : 35.95467 PSU, DO : 7.87804 mg/l, TURBIDITY : 0.9768 FTU [10:48:17] LAT : 43.153897 , LON : -29.019468 , DEPTH : 122.5869 m, TEMP : 14.63741 C, SAL : 35.93682 PSU, DO : 7.41475 mg/l, TURBIDITY : 0.9158 FTU [10:53:18] LAT : 43.15358 , LON : -29.019243 , DEPTH : 283.238 m, TEMP : 13.53148 C, SAL : 35.79333 PSU, DO : 7.38663 mg/l, TURBIDITY : 0.9707 FTU [10:58:19] LAT : 43.153482 , LON : -29.019587 , DEPTH : 439.0591 m, TEMP : 11.74988 C, SAL : 35.51998 PSU, DO : 6.38755 mg/l, TURBIDITY : 0.9646 FTU [11:03:20] LAT : 43.153559 , LON : -29.019864 , DEPTH : 596.1321 m, TEMP : 10.30351 C, SAL : 35.37968 PSU, DO : 6.09524 mg/l, TURBIDITY : 0.9707 FTU [11:08:20] LAT : 43.153714 , LON : -29.020059 , DEPTH : 744.7323 m, TEMP : 9.2492 C, SAL : 35.39878 PSU, DO : 5.85169 mg/l, TURBIDITY : 0.9646 FTU [11:13:21] LAT : 43.15377 , LON : -29.020398 , DEPTH : 891.4872 m, TEMP : 7.59314 C, SAL : 35.28832 PSU, DO : 6.34249 mg/l, TURBIDITY : 0.9646 FTU [11:16:03] manuelaramos leaves the room [11:18:21] LAT : 43.153757 , LON : -29.020457 , DEPTH : 1039.3644 m, TEMP : 6.53386 C, SAL : 35.20841 PSU, DO : 6.90388 mg/l, TURBIDITY : 0.9646 FTU [11:23:22] LAT : 43.15374 , LON : -29.020387 , DEPTH : 1190.0158 m, TEMP : 5.62537 C, SAL : 35.119 PSU, DO : 7.35192 mg/l, TURBIDITY : 0.9585 FTU [11:28:23] LAT : 43.153972 , LON : -29.020311 , DEPTH : 1344.9065 m, TEMP : 4.72744 C, SAL : 35.0147 PSU, DO : 7.94452 mg/l, TURBIDITY : 0.9463 FTU [11:33:23] LAT : 43.15405 , LON : -29.02025 , DEPTH : 1489.1417 m, TEMP : 4.26111 C, SAL : 34.97054 PSU, DO : 8.16068 mg/l, TURBIDITY : 0.9463 FTU [11:38:24] LAT : 43.154044 , LON : -29.020289 , DEPTH : 1635.7933 m, TEMP : 3.96611 C, SAL : 34.94617 PSU, DO : 8.29941 mg/l, TURBIDITY : 0.9463 FTU [11:41:21] Getting ready for our pre-dive briefing. [11:43:25] LAT : 43.154053 , LON : -29.020256 , DEPTH : 1792.2976 m, TEMP : 3.81426 C, SAL : 34.94015 PSU, DO : 8.26751 mg/l, TURBIDITY : 0.9524 FTU [11:48:25] LAT : 43.153987 , LON : -29.020419 , DEPTH : 1940.1809 m, TEMP : 3.74991 C, SAL : 34.93685 PSU, DO : 8.26436 mg/l, TURBIDITY : 0.9463 FTU [11:53:26] LAT : 43.153992 , LON : -29.020649 , DEPTH : 2090.4534 m, TEMP : 3.65502 C, SAL : 34.93279 PSU, DO : 8.25388 mg/l, TURBIDITY : 0.9463 FTU [11:56:13] Good morning [11:58:13] I will be hopping on and off throughout the dive as weekend commitments allow. [11:58:26] LAT : 43.153975 , LON : -29.020881 , DEPTH : 2237.0229 m, TEMP : 3.60284 C, SAL : 34.93142 PSU, DO : 8.22417 mg/l, TURBIDITY : 0.9341 FTU [11:59:01] Thanks for joining on a Saturday. I know well how hard it is to balance dive participation with... life! [11:59:19] taraluke leaves the room [12:01:24] iscwatch leaves the room: Replaced by new connection [12:03:27] LAT : 43.153994 , LON : -29.021137 , DEPTH : 2368.4782 m, TEMP : 3.58956 C, SAL : 34.93101 PSU, DO : 8.2062 mg/l, TURBIDITY : 0.9402 FTU [12:05:00] jaymesawbrey leaves the room: Replaced by new connection [12:08:28] LAT : 43.153946 , LON : -29.021138 , DEPTH : 2515.1633 m, TEMP : 3.57511 C, SAL : 34.9308 PSU, DO : 8.15847 mg/l, TURBIDITY : 0.9341 FTU [12:13:28] LAT : 43.154247 , LON : -29.020886 , DEPTH : 2651.4327 m, TEMP : 3.58493 C, SAL : 34.92921 PSU, DO : 8.18158 mg/l, TURBIDITY : 0.9463 FTU [12:18:29] LAT : 43.154241 , LON : -29.021151 , DEPTH : 2644.3394 m, TEMP : 3.5894 C, SAL : 34.93096 PSU, DO : 8.15477 mg/l, TURBIDITY : 0.928 FTU [12:19:14] taraluke leaves the room [12:22:31] michaelvecchione leaves the room [12:23:29] LAT : 43.154208 , LON : -29.021196 , DEPTH : 2644.836 m, TEMP : 3.59168 C, SAL : 34.92887 PSU, DO : 8.15082 mg/l, TURBIDITY : 0.9341 FTU [12:24:38] About 70 m above the seafloor... [12:28:29] LAT : 43.154426 , LON : -29.020815 , DEPTH : 2658.4704 m, TEMP : 3.58638 C, SAL : 34.92995 PSU, DO : 8.11575 mg/l, TURBIDITY : 0.928 FTU [12:28:35] Good morning Scott and all, seemed a little dark there for a bit.... oh yeah,, that's the deep sea....haha [12:29:19] taraluke leaves the room [12:29:32] @Les: if it becomes necessary we can use te reflectance from my beard for extra light. [12:29:49] right on! [12:32:04] @Les: I'll send you a link to the video, but on the Moytirra vent dive we saw one gorgonian, a large keratosidid that had a full complement of needles in the body wall, almost Acanalla like, but grew as a sparse brancing "whip" Very cool, and likely new (from about 2950 m depth) [12:32:24] Ugh! *Acanella [12:32:31] And yes, we did collect. [12:33:29] LAT : 43.154449 , LON : -29.020951 , DEPTH : 2682.2793 m, TEMP : 3.58605 C, SAL : 34.93109 PSU, DO : 8.14317 mg/l, TURBIDITY : 0.928 FTU [12:33:53] Excellent! Will be very interested! Sounds like F1 clade.... [12:34:18] Bottom in view [12:35:10] EX2205_DIVE04 ROV on Bottom [12:35:37] emilycrum leaves the room [12:38:30] LAT : 43.154375 , LON : -29.020992 , DEPTH : 2711.0789 m, TEMP : 3.59274 C, SAL : 34.93023 PSU, DO : 8.14873 mg/l, TURBIDITY : 0.9341 FTU [12:42:24] no current now but looks like there has been some in the past [12:42:28] Did they get the zoom problem fixed last night on the main camera? [12:42:39] Yes Mike [12:42:51] excellent [12:43:16] deidricdavis leaves the room [12:43:30] LAT : 43.154424 , LON : -29.020922 , DEPTH : 2710.1179 m, TEMP : 3.58733 C, SAL : 34.93139 PSU, DO : 8.14455 mg/l, TURBIDITY : 0.928 FTU [12:43:42] codling, maybe? [12:43:58] or blue antimora? [12:44:05] Antimora rostrata [12:44:57] and NOAA has a lab at the museum [12:46:54] elisabettamenini leaves the room [12:48:31] LAT : 43.154489 , LON : -29.020969 , DEPTH : 2712.1186 m, TEMP : 3.59319 C, SAL : 34.92998 PSU, DO : 8.14042 mg/l, TURBIDITY : 0.928 FTU [12:52:53] Yoda enteropneust [12:53:20] elisabettamenini leaves the room [12:53:31] The Norwegians called it "the spiral shit worm" [12:53:33] LAT : 43.154496 , LON : -29.021046 , DEPTH : 2712.3189 m, TEMP : 3.59274 C, SAL : 34.93035 PSU, DO : 8.15035 mg/l, TURBIDITY : 0.9341 FTU [12:53:45] mining the surface seds.... who says there is no deep sea mining already? [12:54:56] We now know that when they want to change location they go up and drift in benthic boundary layer. [12:57:02] elisabettamenini leaves the room [12:57:05] xenophyophore-type I have to look up name [12:57:15] that's three cukes already and we haven't moved yet. And a xeno.. [12:58:16] Hello all! [12:58:21] Others taht we saw were IDed as "giant protist family Syringamminidae;" [12:58:33] LAT : 43.154526 , LON : -29.021077 , DEPTH : 2712.7037 m, TEMP : 3.59163 C, SAL : 34.93172 PSU, DO : 8.09971 mg/l, TURBIDITY : 0.9463 FTU [12:58:46] taraluke leaves the room [12:58:52] this area is within the N Atlantic bloom zone but at this point there can't be much org matter left on the sed surface [12:59:09] Hello @Asako [12:59:31] Hello Les! [13:00:39] elisabettamenini leaves the room [13:00:47] Good start for deep bathyal soft bottom community [13:01:06] iscwatch leaves the room [13:03:34] LAT : 43.154575 , LON : -29.021331 , DEPTH : 2705.1171 m, TEMP : 3.58828 C, SAL : 34.93152 PSU, DO : 8.1207 mg/l, TURBIDITY : 0.9585 FTU [13:03:39] snub nose spiny eel [13:03:47] not halosaur [13:04:23] Notacanthidae [13:05:12] no dorsal fin? [13:05:36] Interesting that we are seeing them so often. They don't show up that much in trawl samples. [13:05:41] another Yoda [13:06:14] would they go through the mesh, or just escape the trawl? [13:06:42] emilycrum leaves the room [13:06:45] @Les Tina says Hi to you!! [13:06:55] When in soft substrate, please keep an eye out for track-like lebensspuren described in Vecchione, M. and O.A. Bergstad. 2022. Numerous Sublinear Sets of Holes in Sediment on the Northern Mid-Atlantic Ridge Point to Knowledge Gaps in Understanding Mid-Ocean Ridge Ecosystems. Frontiers in Marine Science. 9:812915. doi: 10.3389/fmars.2022.812915 [13:07:11] @Asako, pass on my best wishes to her... is she visiting you? [13:07:13] cusk eel [13:07:38] not antimora [13:07:59] @Les I do! no, she is watching though not on the chat. [13:08:12] pteropod ooze (I love the word ooze) [13:08:15] Ok [13:08:34] LAT : 43.154677 , LON : -29.02148 , DEPTH : 2703.8824 m, TEMP : 3.59163 C, SAL : 34.92973 PSU, DO : 8.11453 mg/l, TURBIDITY : 5.7692 FTU [13:08:44] I suppose it is ooze once the shells break down... [13:09:26] elisabettamenini leaves the room [13:10:12] pteropods are aragonite so more soluble [13:11:05] interesting... it looks like a lot of the shells are getting a Mn coat, however, or is the dark color from something else? [13:11:19] I have to step away for a few minutes but will stay logged so I can read what I missed. [13:12:20] elisabettamenini leaves the room [13:12:50] Bathypathes-ish [13:12:55] by Tina [13:13:35] LAT : 43.154782 , LON : -29.02123 , DEPTH : 2697.9302 m, TEMP : 3.58811 C, SAL : 34.93116 PSU, DO : 8.09104 mg/l, TURBIDITY : 1.7766 FTU [13:14:50] Tina's comment: it is interesing, that pinnules are so short and many [13:18:35] LAT : 43.154815 , LON : -29.021598 , DEPTH : 2689.7396 m, TEMP : 3.5918 C, SAL : 34.92997 PSU, DO : 8.09641 mg/l, TURBIDITY : 0.9951 FTU [13:20:01] deidricdavis leaves the room [13:23:09] i m back [13:23:35] LAT : 43.154777 , LON : -29.021763 , DEPTH : 2689.8654 m, TEMP : 3.59871 C, SAL : 34.93148 PSU, DO : 8.1167 mg/l, TURBIDITY : 1.2149 FTU [13:25:18] turbidity layer [13:25:49] internal waves break on these structures. [13:27:22] documented by teh ECOMAR project [13:28:10] taraluke leaves the room [13:28:36] LAT : 43.154758 , LON : -29.021931 , DEPTH : 2685.8528 m, TEMP : 3.58717 C, SAL : 34.93081 PSU, DO : 8.14274 mg/l, TURBIDITY : 1.3919 FTU [13:29:34] the force is strong with this little one [13:30:14] deidricdavis leaves the room [13:30:14] elisabettamenini leaves the room [13:31:33] Karen Osborn came up with the common name [13:33:21] i don't think it's a glass sponge... would be amazing to sample.. [13:33:36] LAT : 43.154742 , LON : -29.022037 , DEPTH : 2683.0696 m, TEMP : 3.5962 C, SAL : 34.9284 PSU, DO : 8.12532 mg/l, TURBIDITY : 1.0012 FTU [13:34:08] arvindshantharam leaves the room [13:34:20] I've seen some identical to this at Great Meteor smts complex too.. [13:35:02] There are some like this that a Geodia yes [13:38:37] LAT : 43.154756 , LON : -29.022231 , DEPTH : 2673.2453 m, TEMP : 3.58432 C, SAL : 34.93093 PSU, DO : 8.14937 mg/l, TURBIDITY : 1.4774 FTU [13:41:55] taraluke leaves the room [13:42:55] I've seen this type of anemone at Blake Ridge, near but not at, seeps. [13:43:10] never been able to put a name on it, so I am listening/reading closely [13:43:33] sample? [13:43:38] LAT : 43.155006 , LON : -29.022215 , DEPTH : 2669.5355 m, TEMP : 3.58828 C, SAL : 34.93075 PSU, DO : 8.16975 mg/l, TURBIDITY : 1.2454 FTU [13:44:39] Tina says also says anemone [13:48:39] LAT : 43.154994 , LON : -29.022425 , DEPTH : 2661.2885 m, TEMP : 3.58209 C, SAL : 34.93035 PSU, DO : 8.07736 mg/l, TURBIDITY : 1.2393 FTU [13:50:55] anthothelid? [13:51:26] I think I can see node [13:51:39] I have to bail out for a couple of hours. Please send grabs of any cephs you see, he said hopefully. [13:51:49] michaelvecchione leaves the room [13:51:50] Tina says Collect it! [13:51:52] yeah, looks like one node near the base [13:52:24] so if it is bamboo it has very thick coenenchyme [13:52:42] collect this bamboo I mean [13:52:46] taraluke leaves the room [13:53:39] LAT : 43.155104 , LON : -29.022413 , DEPTH : 2658.4415 m, TEMP : 3.58276 C, SAL : 34.93117 PSU, DO : 8.11068 mg/l, TURBIDITY : 1.1966 FTU [13:54:12] of the two "bamboos" the lower one is branched so would be more interesting [13:55:24] @Scott, that Anemone is probably Losactis, but better ask Estefania Rodrigez [13:55:34] comment by Tina [13:56:36] Thanks Asako [13:58:40] LAT : 43.154929 , LON : -29.02244 , DEPTH : 2657.9603 m, TEMP : 3.58449 C, SAL : 34.9308 PSU, DO : 8.10463 mg/l, TURBIDITY : 1.1477 FTU [13:59:33] There is an issue with camera iris so that troubleshooting is also ongoing and is delaying the collection. [14:00:35] emilycrum leaves the room [14:03:13] thanks Scott [14:03:41] LAT : 43.154955 , LON : -29.022495 , DEPTH : 2659.0051 m, TEMP : 3.58482 C, SAL : 34.93028 PSU, DO : 8.12827 mg/l, TURBIDITY : 1.0928 FTU [14:04:06] Ready to sample [14:05:14] Camera issue again. [14:05:30] that coral is not very big [14:08:42] LAT : 43.154919 , LON : -29.022441 , DEPTH : 2659.6309 m, TEMP : 3.58527 C, SAL : 34.93347 PSU, DO : 8.08412 mg/l, TURBIDITY : 1.0745 FTU [14:10:36] christophermah leaves the room [14:10:37] great cut, below the branch [14:10:49] We will move somewhat to allow for drawer to open, and then stow sample [14:12:36] arvindshantharam leaves the room [14:13:43] LAT : 43.154941 , LON : -29.022508 , DEPTH : 2654.0723 m, TEMP : 3.5832 C, SAL : 34.93103 PSU, DO : 8.08125 mg/l, TURBIDITY : 1.0806 FTU [14:15:59] the way the coral is bending I am thinking 30% chance it is anthothelid... will be interesting to see it on the ship [14:17:42] Sample has been stowed. And now back to the rocks as I go for lunch! [14:18:04] @Les: I'll be embarassed if that is the case! [14:18:44] LAT : 43.154824 , LON : -29.022545 , DEPTH : 2653.5774 m, TEMP : 3.58371 C, SAL : 34.92951 PSU, DO : 8.14571 mg/l, TURBIDITY : 1.1172 FTU [14:19:00] taraluke leaves the room [14:23:45] LAT : 43.154984 , LON : -29.022646 , DEPTH : 2643.8712 m, TEMP : 3.58069 C, SAL : 34.93124 PSU, DO : 8.10301 mg/l, TURBIDITY : 0.9585 FTU [14:26:07] yes. a dead sponge [14:26:37] Yay! [14:28:45] LAT : 43.155053 , LON : -29.022784 , DEPTH : 2639.5137 m, TEMP : 3.57908 C, SAL : 34.93067 PSU, DO : 8.10059 mg/l, TURBIDITY : 1.0195 FTU [14:33:46] LAT : 43.154863 , LON : -29.022886 , DEPTH : 2636.5859 m, TEMP : 3.58276 C, SAL : 34.93027 PSU, DO : 8.12659 mg/l, TURBIDITY : 1.0745 FTU [14:37:40] taraluke leaves the room [14:38:33] sea pen umbellula [14:38:45] yes.\ [14:38:47] LAT : 43.155147 , LON : -29.02291 , DEPTH : 2631.3149 m, TEMP : 3.58527 C, SAL : 34.93081 PSU, DO : 8.11393 mg/l, TURBIDITY : 0.9768 FTU [14:38:49] eight arms each [14:38:55] Umbelulla! [14:39:13] type of coral [14:39:37] good lord [14:39:38] or relative of Umbellula... [14:39:57] Hi Chris! [14:40:33] this one does not have much "body" as it were, so I think a different genus [14:41:12] Hello - just joined for this dive. Scanned back to find fishes: Notacanthidae = Polyacanthonotus rissoanus, spiney eel; Ophidiidae (Neobythitinae) = dark abyssal species Barathrites iris, same as seen several times on Dive 3. Interestingly the color of each specimen was a bit different. One steel gray, one medium reddish tan, today dark brown. [14:42:26] taraluke leaves the room [14:42:29] A few other notes: I have never seen a golden elasipod holo on any previous ROV mission. Also, have never seen that large spread out whitish anemone before [14:43:14] neuscampanyallovet leaves the room [14:43:20] Hi @Ken, yeah, I thought the golden holos were generally abyssal [14:43:46] LAT : 43.155009 , LON : -29.022952 , DEPTH : 2625.3995 m, TEMP : 3.58086 C, SAL : 34.93174 PSU, DO : 8.08057 mg/l, TURBIDITY : 1.1294 FTU [14:43:47] It may have been a pseudoumbellula given the number of polyps it had.. [14:44:00] elisabettamenini leaves the room [14:44:45] Hyocrinidae I think [14:46:53] oh nice! eulimids! [14:47:58] On a previous dive this same mission, Scott commented on the general very slow undulation of many deep-living cusk-eels. He is correct, but they are capable of sudden explosive prey strikes or escape reactions. We saw that a few minutes back when that large dark Barathrites was startled by the sub - and undertook a sudden Mauthner reaction. Mauthner neurons are giant single cell neurons that go from the brain right back to the tail tip. When triggered, a ~~2 millisec response is the contraction of all body muscle segments simultaneously. Accompanied with a 90 degree turn to bug out in a direction away from a potential sensed predator [14:48:17] deidricdavis leaves the room [14:48:46] LAT : 43.155091 , LON : -29.022684 , DEPTH : 2620.6735 m, TEMP : 3.57673 C, SAL : 34.93123 PSU, DO : 8.14501 mg/l, TURBIDITY : 0.9829 FTU [14:52:56] some kind of heart urchin [14:52:59] irregularia [14:53:26] likely VERY delicate. wish we could collect..but fragile [14:53:46] oddly enough not all seem to be buried [14:53:48] LAT : 43.155226 , LON : -29.023074 , DEPTH : 2619.8867 m, TEMP : 3.5764 C, SAL : 34.93073 PSU, DO : 8.10013 mg/l, TURBIDITY : 0.9585 FTU [14:54:10] interesting! thank you! [14:54:14] we collected two of these on the southern Emperors. Rich Mooi has them. I will need to look up the name [14:54:52] perhaps more accurate to say.. not completely bury themselves. We occasionally see them plowing through sediment at the surface. [14:55:05] Perhaps that is why it didn't look all that different to me... [14:55:49] lots of sponges [14:57:42] kennethsulak leaves the room [14:58:16] I believe its tunicate [14:58:47] LAT : 43.154997 , LON : -29.023025 , DEPTH : 2615.7057 m, TEMP : 3.58638 C, SAL : 34.92448 PSU, DO : 8.1174 mg/l, TURBIDITY : 0.9402 FTU [14:59:00] deidricdavis leaves the room [14:59:53] genus of little green urchin from Emperors was Pilematechinus, a nornally burying urchin that was out on the rocks [15:00:09] i see a rock pen [15:00:39] kennethsulak leaves the room: Replaced by new connection [15:00:46] neuscampanyallovet leaves the room [15:01:14] Could be the one Gary Williams named after Scott [15:02:17] Yes .. the second or third deepest [15:02:22] just below the rock pen, are those filaments the same as we saw the other day at the inactive mount on Moytirra? [15:02:24] shoudl we collect it? [15:02:39] probably not same but they look similar [15:02:43] there was also a colony to the right, Scott [15:02:44] little chrysogorgiid [15:03:25] we are not that deep so it is probably just a young colony [15:03:27] we dont know many curved rock pens from the Atlantic [15:03:48] LAT : 43.155123 , LON : -29.023111 , DEPTH : 2610.7472 m, TEMP : 3.6087 C, SAL : 34.93406 PSU, DO : 8.08463 mg/l, TURBIDITY : 0.9463 FTU [15:03:52] at least we dont have any samples of any [15:04:13] So far the only known Atlantic rock pen is C. francei [15:08:48] LAT : 43.155188 , LON : -29.023206 , DEPTH : 2606.2359 m, TEMP : 3.58884 C, SAL : 34.92434 PSU, DO : 8.10735 mg/l, TURBIDITY : 0.9402 FTU [15:10:03] That fish is Antimora [15:11:39] I suspect that very tall and thin Chrysogorgia was C. agassizi judging by the tightness and shortness of the branching [15:11:57] Three typical rise-abyssal fish species so far: Polyacanthonotus rissoanus, Barathrites iris, and Antimora rostrata - the last two circumglobal, the notacanth so far only in the Atlantic [15:12:05] but it still looks like black coral... a bit [15:12:16] no [15:12:34] bryozoan? [15:12:55] maybe? [15:13:43] Tina agree with Bryozoan [15:13:48] LAT : 43.155108 , LON : -29.023413 , DEPTH : 2601.7345 m, TEMP : 3.57657 C, SAL : 34.92936 PSU, DO : 8.07596 mg/l, TURBIDITY : 1.4835 FTU [15:13:55] That very loose, flocculent gray sediment surface tuft, easily disturbed + the piles of pteropod shells suggests very high surface watermass productivity here [15:14:04] @Upasana: the rock from from GoMex was not curved? [15:17:13] @Ken, yeah, we are well within the zone of the N Atlantic spring bloom input [15:17:46] neuscampanyallovet leaves the room [15:18:49] LAT : 43.155315 , LON : -29.023474 , DEPTH : 2595.7929 m, TEMP : 3.57673 C, SAL : 34.93008 PSU, DO : 8.11032 mg/l, TURBIDITY : 1.3065 FTU [15:20:39] dissolved oxygen level is high, so nothing here limited by low DO [15:20:46] elisabettamenini leaves the room [15:21:30] is that an urchin or a sponge in the back?? [15:21:34] why the screen is dark today? [15:21:52] tilt up [15:22:08] Corymorpha? [15:22:11] video on this end is pretty dark - hard to see some of the features being described. Turn on more lights??? [15:22:15] above the hydroid [15:22:32] spiny ball [15:22:49] branching fan below right [15:22:58] we need light [15:23:02] yeah, I think Tina reminded us that Brachycerianthus is not circular near the inner tentacles [15:23:07] video very very dark [15:23:49] LAT : 43.15523 , LON : -29.023374 , DEPTH : 2594.5118 m, TEMP : 3.57595 C, SAL : 34.93117 PSU, DO : 8.12191 mg/l, TURBIDITY : 0.9341 FTU [15:23:55] oh wow. if we get a chance... collect that if we see it again [15:24:02] maybe a small cidaroid or not? [15:24:08] spines are crazy long [15:25:05] do you know what very young cidaroids look like? [15:25:26] not all of them [15:25:33] @Les: that sure sounds like the set-up for a joke... [15:25:58] I was wondering if the spines got long before the test fully expanded? [15:26:17] yes. there's precedent for that among echinoderms. [15:26:31] thanks [15:26:35] the disproportionately long or big structures as the animal "catches up" [15:27:02] not sure what we were seeing there though.. espec. if we saw it earlier. [15:28:45] 1.5h or 70min left? [15:28:50] LAT : 43.155175 , LON : -29.023683 , DEPTH : 2584.8942 m, TEMP : 3.57311 C, SAL : 34.93005 PSU, DO : 8.09645 mg/l, TURBIDITY : 0.9524 FTU [15:29:31] @Asako: depends. There may be an opportunity to extend the dive, but it will depend on what we see in the next 15-20 minutes [15:29:49] Thank you @Scott [15:31:37] elisabettamenini leaves the room [15:32:22] I think a synallactid [15:33:50] LAT : 43.155169 , LON : -29.023847 , DEPTH : 2581.0974 m, TEMP : 3.57216 C, SAL : 34.93028 PSU, DO : 8.03132 mg/l, TURBIDITY : 0.9646 FTU [15:34:17] can be a kind of Protoptilum [15:35:24] That gold sea cucumber... was it this one? https://www.ncei.noaa.gov/waf/okeanos-animal-guide/Elasipodida062.html [15:36:11] Nice, J3 clade [15:36:19] nice rock! [15:36:49] could you have close up to the left colony [15:36:52] ? [15:37:16] planar chryso but a bit irregular also [15:37:30] maybe some ascothoracids on the colony [15:37:53] that is definitely an ascothoracid [15:38:18] ok, it must be dead [15:38:28] Mark Grygier has a nice paper on the ascos of the chrysos from the Atlantic [15:38:41] Yes Chris, thanks. That was a Benthodytes we saw earlier. [15:38:51] LAT : 43.155294 , LON : -29.023788 , DEPTH : 2575.9475 m, TEMP : 3.57405 C, SAL : 34.93103 PSU, DO : 8.10566 mg/l, TURBIDITY : 0.9951 FTU [15:39:57] emilycrum leaves the room: Replaced by new connection [15:41:46] The Euplectella type columnar glass sponges with top 'sieve' plate have such and open structure that the sieve plate makes no ecological sense - except as a co-evolved structure to protect its male-female resident pair of Stenopodid boxer shrimp, This seems to be an obligate relationship. The open framework sponge seems ill-adapted as particle strainer. And indeed I recently found a paper indicating that the waste products of the symbiotic 'shrimps' is the source of nutrition for the sponge [15:43:06] elisabettamenini leaves the room [15:43:23] maybe the shrimps are more capable of grabbing larger particles from the incoming water [15:43:46] neuscampanyallovet leaves the room [15:43:52] LAT : 43.155464 , LON : -29.02381 , DEPTH : 2572.8676 m, TEMP : 3.57595 C, SAL : 34.93402 PSU, DO : 8.0916 mg/l, TURBIDITY : 0.9585 FTU [15:44:03] The pair within the glass house is nicely protected from shrimp-loving fishes. And yes, Les, that has been suggested - shrimp to sponge pipeline [15:45:48] synallactidae [15:46:44] vase sponge hydrodynamics: https://www.nature.com/articles/s41586-021-04381-7 [15:47:27] arvindshantharam leaves the room [15:48:52] LAT : 43.155378 , LON : -29.023906 , DEPTH : 2569.3871 m, TEMP : 3.56926 C, SAL : 34.93124 PSU, DO : 8.1152 mg/l, TURBIDITY : 0.9768 FTU [15:49:08] interesting, thanks @Cindy [15:50:11] That is philosophical bull. The first stage of science is observation, the second is data collection, the third is seeking correlations, the third is hypothesis. And integral part of the scientific discourse is debate centered upon hypotheses - some of which can never be tested, for example Proton decay. Long hyphothesized but the universe is not yet old enough to observe that [15:50:24] did you get lasers on that colony? [15:50:26] elisabettamenini leaves the room [15:50:48] neuscampanyallovet leaves the room [15:50:59] stylasteriid [15:51:22] ha! love it Ken! That is the classic argument string theorist put forward as well [15:51:27] grabbing a piece of this would be nice, maybe the stylasterid too [15:52:01] has wacky branch issues! [15:52:12] nice close up... [15:52:44] coenenchyme pretty thick so can't see where nodes are [15:53:01] this clade needs more material collected [15:53:14] this strange branching point is also to the left and right [15:53:21] interesting [15:53:52] LAT : 43.155337 , LON : -29.024045 , DEPTH : 2568.3024 m, TEMP : 3.56942 C, SAL : 34.9333 PSU, DO : 8.05394 mg/l, TURBIDITY : 0.9463 FTU [15:54:03] taraluke leaves the room [15:54:45] Sorry Les. I'm being cognizant of time and the geological desire to see this to the top. But if we get up there and there are still lots of corals, we can collect before taking off. [15:54:59] roger that [15:55:02] But you know I know about the old "we'll get it later" curse! [15:55:16] indeed! [15:55:48] Ancient wisdom: 'Strike while the iron is hot' [15:56:37] They were wise, whoever first said that. [15:58:14] a blacksmith I think. And he was right. We are in the midst of daily monsoon in Florida. Yesterday a nice long string of tiny gray mushrooms popped up along a tree root. Really nifty. I was busy so I said, I will get a photo tomorrow. But they bloomed and shrank all in one day [15:58:28] agree it looks similar [15:58:45] hydrozoan? [15:58:53] LAT : 43.15531 , LON : -29.024362 , DEPTH : 2560.0274 m, TEMP : 3.5639 C, SAL : 34.93195 PSU, DO : 8.10714 mg/l, TURBIDITY : 0.9524 FTU [15:59:07] oh yeah, mushrooms often do not last long [15:59:23] with scalpellids [15:59:37] Tina also agree with bryozoan [16:00:06] great minds think alike! to keep the aphorisms going... [16:02:18] elisabettamenini leaves the room [16:03:53] LAT : 43.155399 , LON : -29.024292 , DEPTH : 2559.8467 m, TEMP : 3.575 C, SAL : 34.93142 PSU, DO : 8.05112 mg/l, TURBIDITY : 0.9646 FTU [16:04:57] I think the distinction between synallactids vs. Benthodytes is that frill around the edge [16:05:11] @Scott Tina suggest to collect this kind of bryozoan when we see them next. they are generally undersampled at this depth. and suggest to scoop because they have rhizoids. [16:05:38] So - seeking for hypotheses for something that cannot easily be tested: In a permanently and absolutely light-deprived environment, why are various holos purple, pink, red, yellow, and even green??? I do not buy the argument that this is just an incidental outcome of some physiological processes. Any hypotheses?? [16:06:23] I woud support collecting the bryozoan for the reason that Tina notes. I doubt there are many records from the MAR [16:07:25] @Ken, consider the recent story about the fluorescing lumpfish [16:08:02] oooooo!!! [16:08:16] can we collect?? [16:08:37] laying eggs or coprophagy?? [16:08:54] LAT : 43.155494 , LON : -29.024522 , DEPTH : 2555.3596 m, TEMP : 3.56345 C, SAL : 34.93129 PSU, DO : 8.0952 mg/l, TURBIDITY : 0.9402 FTU [16:09:09] no worries. thanks! [16:09:24] There are also blue holos. Actually, I have made that suggestion myself during either an earlier OE or OET mission. I think they probably do fluoresce when illumintated by blue bioluminescence from other biolum organisms. [16:09:39] understood. thanks.. [16:10:32] Need a special OE mission with right lights and filters to stimulate and capture fluorescence - get Eddie Widder to lead that [16:10:47] good question. I'm not sure. Did we collect those? I think the crinoid was identified..but the snail image was unclear.. not sure if got a specimen [16:13:17] @Chris: I thought we did collect one (crinoid/snail pair) [16:13:40] Will have to dig back in my laptop to check [16:13:54] LAT : 43.155544 , LON : -29.024577 , DEPTH : 2550.1635 m, TEMP : 3.56183 C, SAL : 34.93127 PSU, DO : 8.09324 mg/l, TURBIDITY : 0.9524 FTU [16:13:58] yes.. I thought so as well. Let me homework that.. I am pretty sure the crinoid was identified..but the snail was not. [16:14:59] neuscampanyallovet leaves the room [16:15:10] I will chase down those specimens. [16:17:53] emilycrum leaves the room [16:18:54] LAT : 43.155402 , LON : -29.024314 , DEPTH : 2551.4931 m, TEMP : 3.58984 C, SAL : 34.92959 PSU, DO : 8.03645 mg/l, TURBIDITY : 0.9402 FTU [16:23:55] LAT : 43.155472 , LON : -29.024528 , DEPTH : 2550.241 m, TEMP : 3.58828 C, SAL : 34.92051 PSU, DO : 8.11153 mg/l, TURBIDITY : 0.9341 FTU [16:24:45] Rock samples in the box. [16:25:32] iscwatch leaves the room: Replaced by new connection [16:26:38] christophermah leaves the room [16:27:50] neuscampanyallovet leaves the room [16:28:28] elisabettamenini leaves the room [16:28:51] Barathrites again [16:28:56] LAT : 43.155625 , LON : -29.024689 , DEPTH : 2547.0705 m, TEMP : 3.5601 C, SAL : 34.93184 PSU, DO : 8.08659 mg/l, TURBIDITY : 0.9524 FTU [16:29:51] Cusk eels seem never to have any parasites. Some fish taxa, synaphobranchid eels, halosaurs, macrourids seem to often be parasitized [16:30:20] Have never seen a notacanth with and external parasite [16:30:35] arvindshantharam leaves the room [16:30:59] how about a field of rocks covered in rock pens? [16:33:28] @Scottfrance I have had the stalked crinoid+snail paged. So will try to get an answer.. my thanks! [16:33:57] LAT : 43.155603 , LON : -29.024989 , DEPTH : 2541.6883 m, TEMP : 3.56613 C, SAL : 34.9296 PSU, DO : 8.05347 mg/l, TURBIDITY : 1.0989 FTU [16:34:34] Geat Chris! Can't believe I noticed the one today from a distance! [16:36:24] manuelaramos leaves the room: Replaced by new connection [16:36:59] Wild speculation on holes in linear series. Chimaeras cruise slowly using their electrosensors to detect their prey. They have parrotlike beaks and are equipped to crush mollusks and other shelled inverts. Chimaeras descend to the bottom when such prey is detected. I can imagine a chimaera feeding in on a linear track - periodically munching detected shelled benthic inverts [16:37:58] How deep do you think they would make a hole Ken? [16:38:17] giant squid tentacle footprints ;) [16:38:57] LAT : 43.155676 , LON : -29.025203 , DEPTH : 2538.8385 m, TEMP : 3.56518 C, SAL : 34.92902 PSU, DO : 8.0585 mg/l, TURBIDITY : 0.9646 FTU [16:39:25] @Scott: is the dive extended or not? [16:39:50] No, dive is not extended. We'll likely be leaving bottom in next 20 minutes or so. [16:39:52] Chimaeras have powerful jaws that project ventrally and probably incorporate suction as well - could see them making such holes. [16:40:04] Dive planning call for tomorrow will be when we leave bottom. [16:40:31] copy Scott [16:40:46] are we at the desired summit? [16:41:46] skates do something similar - also equipped with crushing jaws and electrosensors - but they leave a broad disturbance punctuated with big pits [16:42:06] my guess is the linear holes are made by a burrowing crustacean. Those are periodic vents [16:42:21] still about 10 m off [16:42:47] axiid shrimp make burrow holes of this type [16:43:13] but it is peculiar to have th holes in such a straight line [16:43:47] there are also those burrowing holos - Molpadia, sweetpotato shaped, worm-like and subterranean in habit [16:43:57] LAT : 43.155794 , LON : -29.025051 , DEPTH : 2536.6972 m, TEMP : 3.5663 C, SAL : 34.93331 PSU, DO : 8.00367 mg/l, TURBIDITY : 0.9463 FTU [16:44:02] elisabettamenini leaves the room [16:44:02] christophermah leaves the room [16:44:16] by molpadia doesn't through the sediment up in mounds [16:44:19] It's a mystery [16:44:43] Tina thinks these are feeding rtaces of irregilar seaurchin, that lives in the sediment.. like.. Pourtalesia Echinosigra. [16:45:36] The thing that is very un-invertebrate about these features is that they are linear over a long distance. Most inverts meander, produce winding tracks. Fish tend to do such a linear pattern of foraging [16:45:40] there are also some amphipods that make burrows with sediment thrown out like that, but these are large. But being elongate would more reflect the morphology of the amphipod [16:46:34] argree with Tina but the urchins usually keep going over long distances. This is a restricted distance and the other set we saw was similar [16:46:43] something coming out of one of those tiny holes [16:48:22] would be woerth it to sample to see if it is sulfide? [16:48:33] copied Les to Tina [16:48:42] jaymesawbrey leaves the room [16:48:49] we are keen to know what inverts life on inactive sulfides [16:48:58] LAT : 43.155631 , LON : -29.024956 , DEPTH : 2537.8742 m, TEMP : 3.55804 C, SAL : 34.93041 PSU, DO : 8.06421 mg/l, TURBIDITY : 0.9402 FTU [16:49:21] wish I could type properly [16:50:25] is it worth it to see if the rocks are friable like many sulfides, even if not sampled? [16:50:31] that could be another C. agassizi.... [16:50:39] 15 minutes left on bottom [16:52:10] Mike - do you know of any benthic invert that makes absolutely linear tracks?? with or without holes [16:52:12] thanks - I'm more convinced! [16:53:58] LAT : 43.155665 , LON : -29.025208 , DEPTH : 2534.131 m, TEMP : 3.57054 C, SAL : 34.92915 PSU, DO : 8.07868 mg/l, TURBIDITY : 0.9463 FTU [16:54:41] some sea cukes make nice linear tracks - but the animal is usually found at one end of the line, at least at Blake RIdge [16:55:28] The discourse is illuminating, but the video is not. TOO DARK - MORE LIGHT [16:56:26] Tina's comment: Yuri Kantor wrote, that it was Vetigastropoda at crinoid, quiite possible Trochidae [16:57:27] Thanks Asako [16:57:39] agree with Ken. it was momstly dark today. [16:57:43] Good pun, Ken! Sorry about the lighting. [16:57:47] elisabettamenini leaves the room [16:57:50] *mostly [16:58:13] is this sulfide structure, where the anmals are, do you think? Or more basalt? [16:58:21] I'm not sure if the lighting is a function of the "repairs" to the camera from yesterday, or the different video engineer this afternoon. I will check on it before tmorrow's dive. [16:58:28] @Ken -- others on this chat can answer that question better than I can [16:58:59] LAT : 43.155655 , LON : -29.02538 , DEPTH : 2525.7335 m, TEMP : 3.56245 C, SAL : 34.93137 PSU, DO : 8.05131 mg/l, TURBIDITY : 0.9951 FTU [16:59:11] There is also a hydrological 'jump' at the crest of ad elevated structure - a snowfence effect that turns laminar current into turbulent current. The effect is to keep particles circulating in a crest-top eddy, thus more available to filter or particulate feeders [17:01:30] elisabettamenini leaves the room [17:02:02] sulfide substratum? Can you tell? [17:02:31] with the stylasterid also [17:02:43] agree Les! [17:02:51] its beautiful [17:03:23] cindyvandover leaves the room [17:03:31] EX2205_DIVE04 ROV Ascending [17:03:45] Thank you for the today's dive! [17:04:00] LAT : 43.155577 , LON : -29.025337 , DEPTH : 2524.5258 m, TEMP : 3.55759 C, SAL : 34.93155 PSU, DO : 8.07107 mg/l, TURBIDITY : 0.9585 FTU [17:04:20] thanks again! [17:04:23] Good dive - but lots of enigmas. Obviously high surface productivity and fallout in terms of floc and sediment and pteropods. But curiously low abundance of mobiile megafauana, both fishes and inverts, both benthopelagic and benthic. Also the mystery linear series of holes. And I was expecting just bare basalt today [17:04:53] interesting.... overall a pretty depauperate area compared to the seamounts. Maybe larval delivery is very intermitent. [17:04:56] christophermah leaves the room [17:05:05] We will begin dive planning for tomorrow in just a few minutes, once we get the rest of thebteam in place. [17:05:08] see you! [17:05:13] upasanaganguly leaves the room [17:05:17] marydeere leaves the room [17:05:20] asakomatsumoto leaves the room [17:06:23] leswatling leaves the room [17:06:40] jaymesawbrey leaves the room [17:06:53] kennethsulak leaves the room [17:06:54] I have decided that my career can be summarized as "What the hell is that?" [17:07:06] arvindshantharam leaves the room [17:08:01] neuscampanyallovet leaves the room [17:08:01] elisabettamenini leaves the room [17:09:00] LAT : 43.156265 , LON : -29.024753 , DEPTH : 2497.1901 m, TEMP : 3.562 C, SAL : 34.93033 PSU, DO : 8.05679 mg/l, TURBIDITY : 0.9402 FTU [17:09:35] emilycrum leaves the room [17:10:32] Thanks you! amazing dive!! I also agree it would be nice to get more samples of the "unknown" spp.. but it was fascinating! [17:11:16] manuelaramos leaves the room [17:14:01] LAT : 43.156386 , LON : -29.024891 , DEPTH : 2344.9997 m, TEMP : 3.59698 C, SAL : 34.93136 PSU, DO : 8.10407 mg/l, TURBIDITY : 0.9463 FTU [17:14:50] michaelvecchione leaves the room [17:19:01] LAT : 43.156309 , LON : -29.02536 , DEPTH : 2195.317 m, TEMP : 3.62537 C, SAL : 34.93205 PSU, DO : 8.14294 mg/l, TURBIDITY : 0.9341 FTU [17:19:31] scottfrance leaves the room [17:24:02] LAT : 43.15626 , LON : -29.025632 , DEPTH : 2043.6177 m, TEMP : 3.68489 C, SAL : 34.93397 PSU, DO : 8.13807 mg/l, TURBIDITY : 0.9402 FTU [17:29:02] LAT : 43.156001 , LON : -29.025825 , DEPTH : 1892.0131 m, TEMP : 3.74418 C, SAL : 34.93648 PSU, DO : 8.18749 mg/l, TURBIDITY : 0.9402 FTU [17:30:45] taraluke leaves the room [17:31:50] ashtonflinders leaves the room [17:34:03] LAT : 43.155799 , LON : -29.025885 , DEPTH : 1747.3292 m, TEMP : 3.82365 C, SAL : 34.94079 PSU, DO : 8.20436 mg/l, TURBIDITY : 0.9402 FTU [17:39:03] LAT : 43.156011 , LON : -29.025881 , DEPTH : 1610.8499 m, TEMP : 4.04054 C, SAL : 34.95467 PSU, DO : 8.17897 mg/l, TURBIDITY : 0.9463 FTU [17:44:03] LAT : 43.156102 , LON : -29.02601 , DEPTH : 1450.5646 m, TEMP : 4.29886 C, SAL : 34.97394 PSU, DO : 8.10023 mg/l, TURBIDITY : 0.9402 FTU [17:49:04] LAT : 43.155949 , LON : -29.026257 , DEPTH : 1298.9892 m, TEMP : 4.70716 C, SAL : 35.01355 PSU, DO : 7.90453 mg/l, TURBIDITY : 0.9463 FTU [17:54:04] LAT : 43.155623 , LON : -29.026804 , DEPTH : 1152.1995 m, TEMP : 5.53463 C, SAL : 35.10643 PSU, DO : 7.42745 mg/l, TURBIDITY : 0.9463 FTU [17:59:06] LAT : 43.155587 , LON : -29.02728 , DEPTH : 1003.7738 m, TEMP : 6.74722 C, SAL : 35.22862 PSU, DO : 6.73497 mg/l, TURBIDITY : 0.9646 FTU [18:04:06] LAT : 43.155367 , LON : -29.028085 , DEPTH : 849.3671 m, TEMP : 7.96286 C, SAL : 35.29754 PSU, DO : 6.14919 mg/l, TURBIDITY : 0.9585 FTU [18:09:06] LAT : 43.155096 , LON : -29.029055 , DEPTH : 695.9768 m, TEMP : 9.50598 C, SAL : 35.36264 PSU, DO : 5.83223 mg/l, TURBIDITY : 0.9585 FTU [18:14:07] LAT : 43.154972 , LON : -29.029935 , DEPTH : 540.5717 m, TEMP : 10.79791 C, SAL : 35.41787 PSU, DO : 6.21763 mg/l, TURBIDITY : 0.9646 FTU [18:19:07] LAT : 43.15479 , LON : -29.030683 , DEPTH : 396.998 m, TEMP : 12.52777 C, SAL : 35.62236 PSU, DO : 6.77132 mg/l, TURBIDITY : 0.9707 FTU [18:24:08] LAT : 43.154793 , LON : -29.031612 , DEPTH : 241.804 m, TEMP : 13.66848 C, SAL : 35.81384 PSU, DO : 7.40382 mg/l, TURBIDITY : 0.9829 FTU [18:29:09] LAT : 43.154837 , LON : -29.032688 , DEPTH : 89.504 m, TEMP : 14.70596 C, SAL : 35.92969 PSU, DO : 7.4455 mg/l, TURBIDITY : 0.9219 FTU [18:34:09] LAT : 43.15445 , LON : -29.033931 , DEPTH : 40.8316 m, TEMP : 16.88431 C, SAL : 35.98324 PSU, DO : 8.19138 mg/l, TURBIDITY : 1.0317 FTU [18:36:32] EX2205_DIVE04 ROV on Surface [18:38:21] scottfrance leaves the room [18:55:19] EX2205_DIVE04 ROV Recovery Complete [19:30:35] dereksowers leaves the room [22:09:07] chat-admin leaves the room