[00:02:38] oh wow. so many chrysos!! [00:03:12] The black coral growing in the sponge is Antipathes stylospongia. Its distribution is throughout the area and Musicians. There are 2 specimens at NMNH [00:03:57] https://www.mapress.com/zt/article/view/zootaxa.4868.4.5/41678 [00:04:09] LAT : 26.87963 , LON : -168.098529 , DEPTH : 971.9774 m, TEMP : 3.81363 C, SAL : 34.37582 PSU, DO : 1.11412 mg/l, TURBIDITY : 0.6654 FTU [00:05:45] There are some types of guyots that have flat basalt tops if I am not mistaken, right Val? [00:06:47] christophermah leaves the room [00:08:29] Steve and Chris is it worth sampling one of the bottle brush Chryso's given their abundance ? [00:08:41] samcuellar leaves the room [00:09:10] LAT : 26.879749 , LON : -168.098613 , DEPTH : 961.9555 m, TEMP : 3.84472 C, SAL : 34.36881 PSU, DO : 1.09183 mg/l, TURBIDITY : 0.6654 FTU [00:10:05] Henricia one of the most terrifying taxonomic beasts! [00:11:00] Polychaelid [00:11:04] Brian, I don't think those Chrysogorgia are worth sampling because I think plenty have been sampled already and we've seen larger agregations of those before [00:11:17] Homeryon asper is the polychelid lobster [00:11:30] That is a living fossil [00:11:59] Paracalyptrophora [00:14:11] LAT : 26.87985 , LON : -168.098493 , DEPTH : 962.2205 m, TEMP : 3.842 C, SAL : 34.3687 PSU, DO : 1.07292 mg/l, TURBIDITY : 0.6593 FTU [00:16:53] corals right on the edge to the right look different [00:17:43] Hey Chris, sorry, I was distracted. To your question about guyot tops, I'm not totally sure. Haven't seen one myself (yet). All of the large guyots I'm aware of do have carbonate caps. The smaller, non-guyot seamounts tend to lack carbonates if they never made it near or above sea level [00:18:36] As Asako said earlier, these are almost impossible to id further from video. [00:18:44] christophermah leaves the room [00:19:05] Chris, have you ever encountered a basalt-capped guyot? I'd be curious to dig into that if you have [00:19:08] to the right, it bit reminds me Acanthogorgiid. [00:19:12] LAT : 26.879835 , LON : -168.098487 , DEPTH : 960.3964 m, TEMP : 3.83719 C, SAL : 34.37012 PSU, DO : 1.08047 mg/l, TURBIDITY : 0.6654 FTU [00:19:38] but I couldn't recognize spines. [00:19:43] stevenauscavitch leaves the room: Replaced by new connection [00:20:27] Val, I think I read a paper once in that 1993 collection of papers about seamounts in the Pacific that focused on guyots and they mentioned finding one or more that didn't have a carbonate cap. [00:20:37] I will try to find the paper. [00:20:47] christophermah leaves the room [00:21:22] kennethsulak leaves the room [00:21:39] Chris, some genera, we can recognize on the video but mostly difficult.... [00:22:07] Hmmm! Okay, you have my attention [00:22:32] Also interested in the guyot thing! [00:22:48] hahaha [00:23:25] Sedimentation is increasing here [00:23:41] yes I'm getting stoked about the pooling seds in crevasses we're seeing [00:24:12] LAT : 26.879913 , LON : -168.098663 , DEPTH : 953.3766 m, TEMP : 3.85652 C, SAL : 34.36488 PSU, DO : 1.06577 mg/l, TURBIDITY : 0.6716 FTU [00:24:44] christophermah leaves the room [00:26:19] Hello the OE dive - just joined and scanned back to look for fishes in this very fish-poor basaltic rock habitat. Found two - first one about 3+ hours ago a very nice specimen on the Scyliorhinidae catshark Apristurus sp. There are 25+ species - all rather similar with two small dorsals, extremely attenuate tail, and flattened snout. Looks like this one had a few scrapes with prey or predators. [00:26:59] Ok, it is Waasbergen and Winterer 1993 Summit Geomorphology of Western Pacific Guyots. They specifically said that guyots without reef deposits appear to be products of post-Albian volcanism and erosion at sea level. This paper is in the Pringle et al collection of papers from 1993. [00:27:03] Chris, are you thinking about the ODP Leg 144 papers? [00:27:11] thanks Ken. THere were a lot of fish right when we got to the bottom then they have largely vanished [00:28:00] Sorry, Van Waasbergen. I forgot the Van. [00:28:04] Ahhhh I'll have a look. I have some pet hypotheses about guyot formation, and that detail about "missing" carbonate caps could be an interesting test, potentially [00:28:22] kennethsulak leaves the room [00:28:48] Great, glad to help. Maybe there are a few memory neurons that are still firing in my brain [00:29:12] LAT : 26.880018 , LON : -168.098712 , DEPTH : 951.4395 m, TEMP : 3.85895 C, SAL : 34.364 PSU, DO : 1.07271 mg/l, TURBIDITY : 0.6654 FTU [00:29:58] Seems like all neurons are intact! [00:32:33] Second fish is the angler Sladenia, genus with several species. Typical habitat - hunkered down on rock substrate. One of a small number of fishes that can make a living in this type of habitat poor in mobile megafauna. [00:33:24] headless crinoid! [00:33:58] Phrynocrinus icabodus perhaps Chris? [00:34:13] LAT : 26.880107 , LON : -168.098675 , DEPTH : 946.821 m, TEMP : 3.86908 C, SAL : 34.36179 PSU, DO : 1.07479 mg/l, TURBIDITY : 0.6716 FTU [00:35:23] perfect, i was about to ask for a quick fly-by zoom on the rocks [00:36:33] Val, could this be broken up carbonate? [00:36:44] christophermah leaves the room [00:36:52] Third fish - seen just a few minutes ago under rock - cusk eel. Needed to zoom in to ID, but only a few genera can hack it in this habitat. Most likely candidate here is Diplacanthapoma bracystoma - a real rock-hugger. If you see another, zoom in laterally to ID via bilevel lateral line. [00:37:02] That's what I'm trying to decide. They're crusty with a sprinkling of sediment, so I can't tell [00:37:41] Regardless, we are definitely out of the exposed intrusives section [00:37:49] D. brachystoma - I left out the 'h' [00:38:16] the stalk looks more rugose [00:39:13] LAT : 26.880094 , LON : -168.098834 , DEPTH : 941.2664 m, TEMP : 3.93841 C, SAL : 34.34351 PSU, DO : 1.03781 mg/l, TURBIDITY : 0.6654 FTU [00:39:17] @ChristopherKelley! ha ha! Sorry I was distracted! [00:39:34] Val, I wonder if you should request a piece of this that if they can find a piece small enough. It would be easy enough to check whether it is carbonate on the ship. [00:39:35] i'm not getting clear carbonate yet but the sed accumulation is promising [00:39:40] kennethsulak leaves the room [00:39:46] Sleepy Hollow Canyon! [00:40:04] serios view is showing some column-looking structure idk? [00:40:37] Regadrella [00:43:29] Enallosammia goes all the way up to 450 m or so. [00:43:44] christophermah leaves the room [00:43:47] yes but they really don't like low O2 [00:43:52] another Paramuriceid? [00:44:14] LAT : 26.880222 , LON : -168.098821 , DEPTH : 933.745 m, TEMP : 3.94159 C, SAL : 34.34203 PSU, DO : 1.00978 mg/l, TURBIDITY : 0.6654 FTU [00:44:20] Looks like a mix of sheet and pillow flows. Probably late-stage volcanism [00:44:36] Or just broken sheets [00:44:38] looks different from what we collected. [00:44:48] Yea, I thought I saw a pillow a couple of minutes ago but wasn't sure. [00:45:16] the sclerites of the main branches looks yellowish. [00:46:44] christophermah leaves the room [00:48:21] I don't know Val. These cracks remind me of carbonate pinnacles and blocks that have cracked off the main wall of some shallower dive sites I've been on in a submersible. I think they should try to collect a rock once they get on the summit. [00:48:38] That Walteria is W. flemmingi [00:48:48] Yeah? I can never tell for sure when the transition happens! [00:49:15] LAT : 26.88026 , LON : -168.098941 , DEPTH : 923.4527 m, TEMP : 3.97013 C, SAL : 34.33407 PSU, DO : 1.03648 mg/l, TURBIDITY : 0.6654 FTU [00:49:17] below the walteria, the red one was Paragorgia or something else? [00:49:23] We've been in this massive blocky stuff for a while, so I've been having the internal debate I always do near the summit, hahaha [00:50:20] Yea, I might have won that one but you have Val on the line now. That's like me golfing against Roy McElroy. Guess who is going to win? [00:50:31] Hotspot geochemist people are notoriously avoidant of the tops of volcanoes! It's not the shield stage we're biased toward working on [00:50:50] christophermah leaves the room [00:52:02] Chris, you have the edge over me in years of experience with these dives. There's the famous quote about old age and treachery that I aspire to, someday : D [00:52:08] Incidentally, I haven't checked today to see if Roy won the Masters. I hope he did. [00:52:28] Sorceror eel. [00:52:50] Went to initial bottom contact - macrourid drifting above bottom is the odd Cetonurus crassiceps - with rather globular head. I have never seen this species subsea previously. May be the first OE image of this species?? [00:53:03] Also the rock's still crusty. I stay agnostic on IDs at this depth until there's an interior visible [00:53:18] Oh japonica. shucks, I got look it up. Yea, duckbill eel. [00:54:15] LAT : 26.880426 , LON : -168.098942 , DEPTH : 912.0463 m, TEMP : 3.98377 C, SAL : 34.33079 PSU, DO : 1.03665 mg/l, TURBIDITY : 0.6593 FTU [00:54:22] what was that star? [00:54:45] Ok, I think that eel was Nettastoma parviceps. [00:55:19] kennethsulak leaves the room [00:55:56] no wo0rries [00:56:10] the one to th eright with the straight spines [00:56:22] That urchin reminds me a little HAL from 2001: A Space Odyssey [00:57:06] pretty echinothuriid [00:57:22] The DO is drifting up slightly so it looks like it might be bottoming out just above 1. We have used 1.0 as the threshold for what we call an insular OMZ [00:57:40] farreid [00:58:01] Farrea like [00:58:11] nice, i'd agree w 1 being low oxic/marginally hypoxic [00:58:20] love when the omz definitions match up around the world [00:59:09] gotta sign out for dinner but thanks for the dive! [00:59:13] Sorry for late id on sponge, which I think is Heterorete sp. It has no family and is adrift in the hard sponge group. [00:59:17] LAT : 26.880311 , LON : -168.099076 , DEPTH : 906.0139 m, TEMP : 4.00998 C, SAL : 34.32538 PSU, DO : 1.00756 mg/l, TURBIDITY : 0.6654 FTU [00:59:26] see yu Kelly! [00:59:30] *you [00:59:44] christophermah leaves the room [01:00:00] Interesting at initial touch down to encounter a cluster of a rattail species Cetonurus that is generally rather rare. [01:00:06] Val, these rocks are giving me a fizzy feeling. [01:00:23] kellymarkello leaves the room [01:00:40] They kinda do, don't they, Chris? [01:00:58] It's not typical basalt morphology [01:01:00] Niskin might be a good idea here too [01:01:43] I've just seen something that looks like this in the line islands that was clearly carbonate because it didn't have much crusting on it since it was only 400 me deep. [01:02:58] a post-motem assemblage [01:03:13] Ok, at least some of these dead sponges are Tretopleura sp. [01:03:20] Nice. I was down in the MidPacs last summer. We accidentally dredged a few carbonate caps and those were always obvious the moment we saw the bag, although it wasn't uncommon for them to have a thin veneer of FeMn. If they were intact on the seafloor, they'd be harder to tell apart from basalt [01:03:28] post mortem [01:03:28] kennethsulak leaves the room [01:04:17] LAT : 26.880451 , LON : -168.099001 , DEPTH : 899.5832 m, TEMP : 4.02308 C, SAL : 34.32029 PSU, DO : 1.03904 mg/l, TURBIDITY : 0.6716 FTU [01:04:27] There are the Tretopleura sp [01:04:34] Or even better, Niskin here [01:04:48] amazing community! [01:04:56] absolutely gorgeous omg [01:05:01] amazing [01:05:08] stevenauscavitch leaves the room [01:05:22] I found the full 1993 collection you named, and I'll look through that to see if they say anything helpful about the transition between hard rock and carbonate below the summit. If the transition happened when we went from the dike sequence in the massive blocky stuff and large "column" structures, that was very rapid [01:05:26] wow [01:05:50] Huh. This is really sediment poor [01:06:07] Geat Val. I will be very interesting in hearing your take on the paper. [01:06:32] Yeah, thanks for that, Chris! It looks like a really nice monograph [01:06:51] Swiftia-like [01:06:56] Sure lloks like Swiftia to me. [01:07:02] christophermah leaves the room [01:07:09] could be Swiftia [01:07:27] Chris, definitely definitely carbonate [01:07:37] Those holes are karsts [01:07:42] Yea, I see the holes [01:07:58] yeah exactly what i was thinking [01:08:46] If we have capacity for a biological sample, I would vote for a clipping of the Chrysogorgia (preferably with a squat lobster if one is present) [01:08:55] Yeah, I'm now much more convinced that the transition to carbonate was at the textural change in the rock jointing we all noticed downsection [01:08:57] Since they're the dominant coral at this site [01:09:06] christophermah leaves the room [01:09:18] LAT : 26.880529 , LON : -168.099094 , DEPTH : 896.0751 m, TEMP : 4.02562 C, SAL : 34.31899 PSU, DO : 1.02714 mg/l, TURBIDITY : 0.6654 FTU [01:09:20] kennethsulak leaves the room [01:09:41] Ok, I hate this but I have to help make dinner. So I have to leave but what a great dive and great call Brian and Sara to dive here. Talk to you all tomorrow. [01:09:49] Go eat! [01:09:54] christopherkelley leaves the room [01:10:03] thanks Chris!! So glad to have had you here! [01:10:15] see you Chris! [01:12:48] christophermah leaves the room [01:13:27] big fish [01:14:18] LAT : 26.88045 , LON : -168.099173 , DEPTH : 895.3023 m, TEMP : 4.03653 C, SAL : 34.31544 PSU, DO : 1.03497 mg/l, TURBIDITY : 0.6654 FTU [01:15:27] Is that an anemone on an old holdfast in the lower left corner? [01:15:42] two I belive [01:15:53] Wild. Anything to get that feeding advantage [01:16:44] christophermah leaves the room [01:17:18] btw for dive notes I'm saying carbonate / karst at ~~900m as the shallowest possible depth for transition [01:17:36] stevenauscavitch leaves the room [01:19:19] LAT : 26.880572 , LON : -168.099211 , DEPTH : 897.5894 m, TEMP : 4.03757 C, SAL : 34.32021 PSU, DO : 1.03083 mg/l, TURBIDITY : 0.6654 FTU [01:22:19] kennethsulak leaves the room [01:22:44] christophermah leaves the room [01:23:01] Yeah agree. Not unusual. Madrepora and Enallopsammia overlap [01:23:49] more Tretopleura [01:24:04] yeah its just he DO is so low I am surpised to see it here [01:24:20] LAT : 26.880594 , LON : -168.099183 , DEPTH : 896.6635 m, TEMP : 4.02932 C, SAL : 34.3181 PSU, DO : 1.01262 mg/l, TURBIDITY : 0.6654 FTU [01:24:32] stevenauscavitch leaves the room [01:24:43] ZOOM on the star? [01:26:44] christophermah leaves the room [01:27:44] Lophaster.. possibly going after that stalked crinoid [01:29:20] stevenauscavitch leaves the room [01:29:21] LAT : 26.880586 , LON : -168.099242 , DEPTH : 895.495 m, TEMP : 4.00172 C, SAL : 34.32608 PSU, DO : 1.02777 mg/l, TURBIDITY : 0.6654 FTU [01:30:27] need to sign off - thanks to OE mission crew for excellent zoomed in fish images [01:30:36] thank you kenneth! [01:31:18] I'll tell ya this about making ID mistakes.. you learn from it. Keep at it! [01:31:19] kennethsulak leaves the room [01:32:20] thanks for the encouragement Chris :') [01:34:02] christophermah leaves the room [01:34:21] LAT : 26.880805 , LON : -168.099195 , DEPTH : 896.6177 m, TEMP : 3.97707 C, SAL : 34.332 PSU, DO : 1.01697 mg/l, TURBIDITY : 0.6654 FTU [01:36:50] christophermah leaves the room [01:38:09] valfinlayson leaves the room [01:39:22] LAT : 26.880807 , LON : -168.099216 , DEPTH : 899.1575 m, TEMP : 3.92194 C, SAL : 34.34642 PSU, DO : 1.03617 mg/l, TURBIDITY : 0.6838 FTU [01:42:44] christophermah leaves the room [01:44:23] LAT : 26.880757 , LON : -168.099289 , DEPTH : 894.4691 m, TEMP : 3.92385 C, SAL : 34.35036 PSU, DO : 1.05942 mg/l, TURBIDITY : 0.7326 FTU [01:49:23] is it just me or are all those stalked crinoids much SMALLER than earlier in the dive? [01:49:25] LAT : 26.880692 , LON : -168.099415 , DEPTH : 890.8207 m, TEMP : 3.96083 C, SAL : 34.33712 PSU, DO : 1.02305 mg/l, TURBIDITY : 0.6654 FTU [01:50:35] probably Henricia.. feeding on small sponges in that area [01:51:51] oh interesting! stronger current [01:52:30] yeah I'd guess it maybe has to do with current but idk? would need to get a good scale on the deeper and shallower communities [01:54:24] LAT : 26.880934 , LON : -168.099531 , DEPTH : 884.9202 m, TEMP : 3.9043 C, SAL : 34.35294 PSU, DO : 1.03537 mg/l, TURBIDITY : 0.6654 FTU [01:54:55] christophermah leaves the room [01:57:10] christophermah leaves the room [01:58:46] Ok thanks. have a great night. [01:58:56] thanks all [01:59:00] thanks gang! [01:59:00] stevenauscavitch leaves the room [01:59:03] Thank you for the great dive!!! [01:59:16] Nice dive. See you on the next one! [01:59:21] THANK YOU! a good echinoderm collection day! VERY grateful! [01:59:25] LAT : 26.881039 , LON : -168.099669 , DEPTH : 881.566 m, TEMP : 3.9013 C, SAL : 34.35468 PSU, DO : 1.05584 mg/l, TURBIDITY : 0.6593 FTU [02:00:15] christophermah leaves the room [02:00:27] asakomatsumoto leaves the room [02:01:37] briankennedy leaves the room [02:01:47] sarakahanamoku leaves the room [02:02:34] EX2503_DIVE03 ROV Ascending [02:04:26] LAT : 26.880741 , LON : -168.099921 , DEPTH : 828.5104 m, TEMP : 4.14798 C, SAL : 34.28579 PSU, DO : 1.01583 mg/l, TURBIDITY : 0.6716 FTU [02:09:07] chat-admin leaves the room [02:09:26] LAT : 26.880709 , LON : -168.099795 , DEPTH : 683.0308 m, TEMP : 5.11569 C, SAL : 34.10376 PSU, DO : 1.72398 mg/l, TURBIDITY : 0.6654 FTU [02:14:27] LAT : 26.880934 , LON : -168.099641 , DEPTH : 536.5677 m, TEMP : 6.97067 C, SAL : 34.03459 PSU, DO : 3.7308 mg/l, TURBIDITY : 0.6654 FTU [02:19:28] LAT : 26.880746 , LON : -168.099135 , DEPTH : 393.9624 m, TEMP : 10.08203 C, SAL : 34.13924 PSU, DO : 5.97246 mg/l, TURBIDITY : 0.6716 FTU [02:24:28] LAT : 26.880547 , LON : -168.098692 , DEPTH : 249.8721 m, TEMP : 14.13177 C, SAL : 34.43154 PSU, DO : 6.65925 mg/l, TURBIDITY : 0.6654 FTU [02:29:29] LAT : 26.880616 , LON : -168.098085 , DEPTH : 103.6483 m, TEMP : 19.61302 C, SAL : 34.97453 PSU, DO : 7.24617 mg/l, TURBIDITY : 0.7204 FTU [02:34:29] LAT : 26.88102 , LON : -168.097611 , DEPTH : 27.7562 m, TEMP : 21.61988 C, SAL : 35.17556 PSU, DO : 7.26026 mg/l, TURBIDITY : 0.641 FTU [02:36:42] EX2503_DIVE03 ROV on Surface [02:54:23] EX2503_DIVE03 ROV Recovery Complete [02:58:09] valfinlayson leaves the room [06:10:05] briankennedy leaves the room [15:06:57] LindaSunderland leaves the room [17:14:39] EX2503_DIVE04 ROV powered off [17:18:31] EX2504 DIVE04 Test message [17:20:01] chat-admin leaves the room [17:29:36] EX2503_DIVE04 ROV powered off [17:32:06] philhartmeyer leaves the room [17:41:34] EX2503_DIVE04 ROV powered off [17:41:43] philhartmeyer leaves the room [18:20:41] EX2503_DIVE04 ROV Launch [18:30:37] EX2503_DIVE04 ROV on Surface [18:30:52] EX2503_DIVE04 ROV Descending [18:32:08] LAT : 26.960995 , LON : -168.888369 , DEPTH : 19.0042 m, TEMP : 21.67738 C, SAL : 35.2301 PSU, DO : 7.21037 mg/l, TURBIDITY : 0.5861 FTU [18:37:09] LAT : 26.96086 , LON : -168.887686 , DEPTH : 60.6337 m, TEMP : 21.2129 C, SAL : 35.18832 PSU, DO : 7.21283 mg/l, TURBIDITY : 0.6716 FTU [18:42:09] LAT : 26.960517 , LON : -168.886386 , DEPTH : 200.8804 m, TEMP : 15.30908 C, SAL : 34.53452 PSU, DO : 6.72305 mg/l, TURBIDITY : 0.6593 FTU [18:43:32] chat-admin leaves the room [18:47:09] LAT : 26.960175 , LON : -168.88557 , DEPTH : 341.3887 m, TEMP : 11.40227 C, SAL : 34.24091 PSU, DO : 6.57602 mg/l, TURBIDITY : 0.6593 FTU [18:52:10] LAT : 26.96018 , LON : -168.885555 , DEPTH : 482.3568 m, TEMP : 8.41823 C, SAL : 34.05661 PSU, DO : 5.45415 mg/l, TURBIDITY : 0.6654 FTU [18:57:10] LAT : 26.95981 , LON : -168.885269 , DEPTH : 634.3738 m, TEMP : 5.92669 C, SAL : 34.04678 PSU, DO : 3.10684 mg/l, TURBIDITY : 0.6654 FTU [19:02:11] LAT : 26.959682 , LON : -168.885424 , DEPTH : 781.7478 m, TEMP : 4.53994 C, SAL : 34.19541 PSU, DO : 1.32556 mg/l, TURBIDITY : 0.6593 FTU [19:05:03] sarakahanamoku leaves the room [19:07:11] LAT : 26.959612 , LON : -168.885467 , DEPTH : 934.3741 m, TEMP : 3.90222 C, SAL : 34.33726 PSU, DO : 0.96493 mg/l, TURBIDITY : 0.6593 FTU [19:12:11] LAT : 26.959917 , LON : -168.885572 , DEPTH : 1090.7906 m, TEMP : 3.46564 C, SAL : 34.44052 PSU, DO : 1.26545 mg/l, TURBIDITY : 0.6654 FTU [19:17:12] LAT : 26.960075 , LON : -168.88556 , DEPTH : 1253.7779 m, TEMP : 3.09184 C, SAL : 34.49584 PSU, DO : 1.58199 mg/l, TURBIDITY : 0.6532 FTU [19:20:27] chat-admin leaves the room [19:22:12] LAT : 26.960371 , LON : -168.885387 , DEPTH : 1413.3028 m, TEMP : 2.7113 C, SAL : 34.53533 PSU, DO : 1.84789 mg/l, TURBIDITY : 0.6593 FTU [19:27:13] LAT : 26.960314 , LON : -168.885202 , DEPTH : 1576.1617 m, TEMP : 2.43826 C, SAL : 34.56352 PSU, DO : 2.14075 mg/l, TURBIDITY : 7.967 FTU [19:30:19] christophermah leaves the room [19:32:14] LAT : 26.959851 , LON : -168.884967 , DEPTH : 1621.6433 m, TEMP : 2.23146 C, SAL : 34.58302 PSU, DO : 2.42706 mg/l, TURBIDITY : 0.6654 FTU [19:35:31] Bolosoma sp sponges to upper left [19:35:43] Good afternoon, looks like some nice crusty old rocks : ) [19:36:18] christophermah leaves the room [19:36:52] It looks as though some of these angular rocks may be suitable [19:37:15] LAT : 26.959733 , LON : -168.884869 , DEPTH : 1621.2977 m, TEMP : 2.22083 C, SAL : 34.58529 PSU, DO : 2.42368 mg/l, TURBIDITY : 0.6716 FTU [19:37:20] Possibly the larger one below the sponge, slightly to the right [19:37:21] The sponge is curious [19:38:10] Or I should have said that I am curious about the sponge [19:38:20] Yes [19:38:50] Chris Mah! I haven't had a chance to email you yet but yesterday's sediment turned up infaunal brachiopods!! Truly a paleozoic-type seamount fauna! [19:39:33] christophermah leaves the room [19:39:50] That one looks good [19:40:19] Thank you, pilots! [19:40:46] Actually both of the sponges if possible [19:41:21] oooo! I was wondering if you were finding good stuff on those rocks! when I was out there-there were a bunch of forams and other bits [19:41:26] heatherjudkins leaves the room [19:42:15] LAT : 26.959799 , LON : -168.884929 , DEPTH : 1620.95 m, TEMP : 2.21703 C, SAL : 34.58778 PSU, DO : 2.42883 mg/l, TURBIDITY : 0.6654 FTU [19:42:20] @sara I assume some kind of "articulate" brachiopod.. not a lingulid type? [19:42:43] I don't know what this sponge is [19:43:00] collection? [19:43:04] There is SO much good stuff on these rocks! and yes, articulate brach, external attachment and not linguilid shaped! but the brach shells are quite thin and fragile [19:43:16] I am pondering.... [19:43:34] and lots of great micro things on the rocks that I many questions about [19:43:42] Yes please [19:44:06] ha ha. I wish we could share pix on the chat room [19:44:20] heatherjudkins leaves the room [19:44:23] Sara, that's great to hear! The more a sample can be used in different ways, the better the science [19:44:24] Someone is at the door. But yes please sample [19:44:27] stevenauscavitch leaves the room [19:44:34] Me too, I can send pictures later to yall to take a look! [19:45:00] ha ha. Science poke and not the tuna? poke'? [19:45:05] And val the rocks are fascinating in terms of bio as well, so very glad we're getting a fair number here! [19:45:13] Chris, you're making me hungry [19:45:32] mm...tuna... [19:45:54] I'm hungry now too! sheesh [19:47:16] LAT : 26.959798 , LON : -168.884845 , DEPTH : 1620.824 m, TEMP : 2.23484 C, SAL : 34.58264 PSU, DO : 2.38205 mg/l, TURBIDITY : 0.6654 FTU [19:47:24] christophermah leaves the room [19:48:07] sorry also typo on the brach sentence ** NO external attachment afaik [19:49:33] no worries. I gotcha! [19:50:32] hello all! [19:50:51] good morning [19:50:56] good morning asako! [19:52:03] its isidid [19:52:17] LAT : 26.959821 , LON : -168.8848 , DEPTH : 1622.4972 m, TEMP : 2.23852 C, SAL : 34.57998 PSU, DO : 2.43922 mg/l, TURBIDITY : 0.6593 FTU [19:52:20] Hello, Asako! [19:52:24] Tridentisis candelabrum [19:52:39] Tridentisis [19:53:03] Hi Brian, Sara, Van, Steve! [19:56:41] christophermah leaves the room [19:57:08] heatherjudkins leaves the room [19:57:18] LAT : 26.959847 , LON : -168.884859 , DEPTH : 1620.734 m, TEMP : 2.22421 C, SAL : 34.58272 PSU, DO : 2.43262 mg/l, TURBIDITY : 0.6654 FTU [19:57:31] Besides the rocks, I'm hoping for some of those giant bolosomas today, like what we found on some of the Lili'uokalani seamounts. Not sure whether this is too far south for those though? [19:59:29] christophermah leaves the room [20:02:18] LAT : 26.959749 , LON : -168.884808 , DEPTH : 1613.627 m, TEMP : 2.27193 C, SAL : 34.57931 PSU, DO : 2.34363 mg/l, TURBIDITY : 0.6593 FTU [20:02:34] heatherjudkins leaves the room [20:03:03] Nematocarcinus I think [20:04:33] It is definitely crusty basalt though. And some dikes intruding through here and there. Wonder whether the higher sedimentation levels around here is affecting the population density of this area [20:04:44] morning all [20:04:54] morning everyone [20:05:02] morning [20:05:37] morning [20:05:44] Morning! [20:06:05] samcuellar leaves the room [20:06:17] christophermah leaves the room [20:07:10] heatherjudkins leaves the room [20:07:18] Proisocrinus ruberrimus the Moulin Rouge crinoid [20:07:20] LAT : 26.959619 , LON : -168.884852 , DEPTH : 1605.7084 m, TEMP : 2.29673 C, SAL : 34.57667 PSU, DO : 2.30867 mg/l, TURBIDITY : 0.6593 FTU [20:07:41] emilymclaughlin leaves the room [20:07:44] that's what the crinoid people call them [20:09:15] Yes.. the stalk is composed of individual bits that are very different in cross-section.. Similar to what you'd see on a roadcut.. diff. species diff. pieces [20:10:19] ha ha "in the flesh".. [20:11:25] seen any jellies yet? [20:12:17] christophermah leaves the room [20:12:20] LAT : 26.959644 , LON : -168.884802 , DEPTH : 1601.0846 m, TEMP : 2.3297 C, SAL : 34.57432 PSU, DO : 2.28051 mg/l, TURBIDITY : 0.6654 FTU [20:12:56] nice. Will need to take a look if any shrimps perched on thoese pyrosomes taking a rest [20:14:16] sarakahanamoku leaves the room: Replaced by new connection [20:16:06] sarakahanamoku leaves the room: Replaced by new connection [20:17:20] LAT : 26.959563 , LON : -168.884783 , DEPTH : 1599.5523 m, TEMP : 2.3147 C, SAL : 34.57556 PSU, DO : 2.32071 mg/l, TURBIDITY : 0.6654 FTU [20:18:23] christophermah leaves the room [20:20:22] christophermah leaves the room [20:22:21] LAT : 26.959525 , LON : -168.884724 , DEPTH : 1592.7429 m, TEMP : 2.37444 C, SAL : 34.56987 PSU, DO : 2.24525 mg/l, TURBIDITY : 0.6654 FTU [20:22:52] christopherkelley leaves the room [20:23:40] Hemicorallium [20:23:44] caprellid [20:23:47] Hemicorallium for me [20:25:17] christophermah leaves the room [20:27:09] sarakahanamoku leaves the room [20:27:18] Luau crab [20:27:22] LAT : 26.959469 , LON : -168.884642 , DEPTH : 1589.7451 m, TEMP : 2.38948 C, SAL : 34.56778 PSU, DO : 2.23285 mg/l, TURBIDITY : 0.6654 FTU [20:27:23] that's so cool [20:28:42] Sorry I was gone for a bit but I'm back now. Thanks very much for the sponge collection. It was no doubt a euplectellid but I don't recognize it as anything we have seen before [20:29:27] morning Chris! [20:29:35] Hi Asako! [20:29:46] christophermah leaves the room [20:30:19] Lillipathes again Asako or something different? [20:32:07] Chris, possibly. Tina is sleeping but yesterday, she mentioned one of black coral as Lillipathes or Trissopathes. [20:32:23] LAT : 26.95951 , LON : -168.884607 , DEPTH : 1586.0341 m, TEMP : 2.39582 C, SAL : 34.56647 PSU, DO : 2.21875 mg/l, TURBIDITY : 0.6654 FTU [20:32:36] the lillipathes was the planar one from yesterday right? [20:32:51] samcuellar leaves the room [20:33:00] I think these are Trissopathes [20:33:02] Brian, yes. but she need more zoom for the other side [20:33:07] heatherjudkins leaves the room [20:33:26] Stalked sponge is Bolosoma sp [20:33:55] lindasunderland leaves the room [20:34:07] samcuellar leaves the room [20:34:16] nice! [20:34:17] christophermah leaves the room [20:35:43] val what are you thinking re: the pockets where seds are collecting? [20:36:10] Is that the enstrusted bits weathering? I'm super unfamiliar with mn crust [20:37:24] LAT : 26.959434 , LON : -168.884515 , DEPTH : 1583.2393 m, TEMP : 2.39771 C, SAL : 34.56693 PSU, DO : 2.20284 mg/l, TURBIDITY : 0.6593 FTU [20:38:16] heatherjudkins leaves the room [20:40:01] also Tridentisis candelabrum. described last year https://mapress.com/zt/article/view/zootaxa.5497.4.3 [20:40:03] Sara, pure speculation is that maybe there's something to do with sediment load and deep-sea currents out here at the western end of this little seamount chain. This dive is taking also taking place on the opposite of the seamount compared to yesterday's dive, and that may be a factor too (if the currents have the same prevailing direction in the two locations) [20:40:38] samcuellar leaves the room [20:41:02] Thanks val!!! I love pure speculation :-) really appreciate your input during these dives! [20:41:09] No prob! [20:41:15] heatherjudkins leaves the room [20:41:25] ha ha.. maybe a slime star! [20:41:42] I might be a bit more tuned in and out today - I'm at the office and working on a paper. May have to pop into the lab a little later too [20:41:50] yup [20:41:53] Hymenaster [20:42:24] Yep, thinking you're right, Chris [20:42:25] LAT : 26.959435 , LON : -168.884455 , DEPTH : 1580.9736 m, TEMP : 2.40197 C, SAL : 34.56672 PSU, DO : 2.19899 mg/l, TURBIDITY : 0.6593 FTU [20:42:53] Body on this one is VERY gelatinous.. [20:43:23] the shallow ones do that for sure.. I've seen this on some collected and brought up. [20:43:41] they get up to about 1.5 feet across [20:44:21] wow! that's enormous [20:44:43] Hemicorallium agree [20:44:45] ha ha.. maybe I should double check if its a new species! [20:45:15] heatherjudkins leaves the room [20:45:35] lindasunderland leaves the room [20:46:04] Hi Linda! Glad you made it on the chat! Let us know if we're missing any gastropods you'd like us to see! [20:46:27] @sara my experience with a Hawaiian Hymenaster https://x.com/echinoblog/status/515897919548162049/photo/1 [20:47:25] LAT : 26.959373 , LON : -168.884423 , DEPTH : 1574.7043 m, TEMP : 2.4205 C, SAL : 34.56576 PSU, DO : 2.17605 mg/l, TURBIDITY : 0.6654 FTU [20:48:33] chris I can't wait to read that later! [20:49:38] samcuellar leaves the room [20:50:05] its just the pic [20:50:09] little red Trachymedusa just floated past [20:50:09] heatherjudkins leaves the room [20:50:14] oh duh hahaha [20:50:37] oh gosh I had to zoom in to see the pic! that is GOOPY [20:50:44] (sorry my eyes are dilated from scopolpamine lol) [20:51:28] dead siphonophore probably [20:51:37] christophermah leaves the room [20:52:25] LAT : 26.959398 , LON : -168.884322 , DEPTH : 1575.4822 m, TEMP : 2.4108 C, SAL : 34.56647 PSU, DO : 2.1869 mg/l, TURBIDITY : 0.6532 FTU [20:55:08] Sara, here's a technical question for you. Every ROV expedition I've been on, we've really struggled to get a successful sediment core that actually preserves the stratigraphy. There seems to be an issue with the diameter of the corers versus the typically very fine grain size of the sediments. It's also common that sediment deposits aren't very thick (which doesn't help with wide corers), but even in thicker sediment deposits, it's hard to retain a good core. [20:55:30] sarakahanamoku leaves the room [20:55:58] Do you have any thoughts on how we might be able to improve ROV sediment sampling when preservation of the stratigraphy would be important? [20:57:26] LAT : 26.95944 , LON : -168.8842 , DEPTH : 1578.4828 m, TEMP : 2.41293 C, SAL : 34.56699 PSU, DO : 2.20198 mg/l, TURBIDITY : 0.6593 FTU [20:57:42] ha ha.. Sara you need to visit us.. we got a couple of coelocanths! [20:57:59] i would LOVE TO [20:58:02] Is anyone else getting bumped off the chat? It's happening a bunch on my end. [20:58:36] yes, i have to keep logging in [20:58:59] Ok, thanks! Making sure it wasn't something on my end... [20:59:01] the timeout is very short [21:01:12] Halosaur [21:01:31] Halosaurus sp specifically [21:02:27] LAT : 26.959421 , LON : -168.884121 , DEPTH : 1575.4967 m, TEMP : 2.45074 C, SAL : 34.56259 PSU, DO : 2.17079 mg/l, TURBIDITY : 0.6593 FTU [21:02:31] How to tell from Aldrovandia? [21:03:49] Scales on head Dhugal [21:04:05] Can confirm, old scraggly lava field [21:04:22] stevenauscavitch leaves the room [21:04:36] @Sara you have fans on Blue Sky.. one sez "If you can get a message to the woman who is narrating, please tell her to never stop getting excited about mollusks/animals/science" [21:04:58] Halosaurus does not have the adipose tissue covering the snout. Halosaurus tends to have a shorter and more white snout than the more clear snout of Aldrovandia [21:05:01] Thx Chris [21:05:07] HAHA oh my gosh thank you Chris Mah that makes me so happy [21:05:14] luckily I am an endless well of enthusiasm [21:05:54] there were other things on Bluesky yesterday.. forgot to relay.. [21:06:03] will let you know [21:06:07] gosh love it. I gotta get on bluesky [21:06:22] heatherjudkins leaves the room [21:06:48] Yeah, it's a mix of lava flows and the occasional dike today [21:07:04] I use old "pidgin" for the chat. it works. when I use chat at the webpage, the timeout is very short. [21:07:18] I unfortunately had to miss a bunch of the video due to chores and visitors. I looked back on Youtube and saw a somewhat close up of those squat white sponges on the bottom with the big osculum. If you have a chance, could you zoom another one such as those near center? [21:07:27] LAT : 26.959312 , LON : -168.883931 , DEPTH : 1569.4834 m, TEMP : 2.48943 C, SAL : 34.55919 PSU, DO : 2.10596 mg/l, TURBIDITY : 0.6654 FTU [21:08:27] christophermah leaves the room [21:08:58] I think what we're seeing here is more or less the original, intact stratigraphy. Some local collapses might've happened, since we are seeing a few dikes here, but most of this is probably overall still in place [21:09:20] nice pillow to right [21:09:43] ooo pillows!!! [21:09:59] If it was a pillow though. Would you agree Val? [21:10:01] The last couple of dives before this, we were traversing up some features where big collapses happened along the flanks of the guyots we surveyed, and those large collapses can expose big cross-sections of the interior plumbing system of the volcano [21:10:16] ooooooo incredible will relay [21:10:21] thanks Val!!! [21:10:54] Those large collapses are also thought to be partly why guyots have those steep sides, then that sharp slope break near the summits where everything flattens out [21:11:22] Halosaur (name = salt + lizard) is Halosaurus. In addition of characters noted by Christopher, also diagonistic are the scales atop the head. This fish is probably H. guenthteri, based on coloration - white rim around snout and monotone body color [21:11:26] Chris, I didn't see the exact thing you spotted, but yes - more pillows, fewer dikes (but there are still some dikes showing up here and there) [21:11:47] If I see another, I will point it out [21:12:28] LAT : 26.959298 , LON : -168.883815 , DEPTH : 1565.0704 m, TEMP : 2.47234 C, SAL : 34.56123 PSU, DO : 2.11551 mg/l, TURBIDITY : 0.6654 FTU [21:12:32] I think it may have been just a ridge and not a pillow. I thought it was round but maybe not [21:14:30] heatherjudkins leaves the room [21:14:33] Oahu has a feature that parallels those big collapses that you can see on land, which is wild to think about. The palis out by Waimanalo are where geologists think that a huge part of the Ko'olau volcano collapsed many tens of thousands of years ago. You can see the debris field on the seafloor, north of the island, in Google Earth [21:14:56] stevenauscavitch leaves the room [21:15:46] I think that could have been Atelecrinus conifer. Naked tips to arms and long cirri. Would you agree Chris Mac? [21:16:17] christophermah leaves the room [21:16:47] sarakahanamoku leaves the room [21:17:28] LAT : 26.959214 , LON : -168.883799 , DEPTH : 1560.0089 m, TEMP : 2.4828 C, SAL : 34.56007 PSU, DO : 2.13567 mg/l, TURBIDITY : 0.6532 FTU [21:18:00] I guess its name is now Paratelecrinus conifer. But I think that was it. [21:18:07] heatherjudkins leaves the room [21:19:28] briankennedy leaves the room [21:19:42] Yes, Hemicorallium [21:19:44] agree Hemicorallium [21:20:14] heatherjudkins leaves the room [21:20:25] I agree, what is that?? [21:22:10] heatherjudkins leaves the room [21:22:17] I think this could be Hemicorallium ducale. It doesn't have very long calyces but rather intermediate length ones which is one of the characteristics. I also don't think they get as wormy as the other Hemicorallium [21:22:29] LAT : 26.95925 , LON : -168.88368 , DEPTH : 1560.7459 m, TEMP : 2.48233 C, SAL : 34.55907 PSU, DO : 2.11196 mg/l, TURBIDITY : 0.6654 FTU [21:23:41] seastar [21:26:09] heatherjudkins leaves the room [21:27:12] kaseycantwell leaves the room [21:27:14] another Hemicorallium [21:27:28] can you zoom on one of the many solenogastres? [21:27:30] LAT : 26.959133 , LON : -168.883584 , DEPTH : 1555.8086 m, TEMP : 2.48203 C, SAL : 34.56022 PSU, DO : 2.13592 mg/l, TURBIDITY : 0.6654 FTU [21:27:53] yes can zoom on aplac [21:29:04] Yes, this is Hemicorallium ducale I think. It has the little bumps on the stalk between the polyps. Not sure if those are called siphonzooids or something like that but perhaps that is what they are. Again, I am just too rusty on my ids [21:29:25] Not stalk but branches I meant [21:30:07] heatherjudkins leaves the room [21:32:24] heatherjudkins leaves the room [21:32:29] LAT : 26.959184 , LON : -168.883484 , DEPTH : 1546.3155 m, TEMP : 2.49055 C, SAL : 34.559 PSU, DO : 2.12723 mg/l, TURBIDITY : 0.6654 FTU [21:32:47] Hey, a fellow UMD person! [21:32:51] my best guess would be Amphimeniidae, but without being able to look at them more, the most confident I can say is Cavibelonia [21:33:04] (for the Solenogastres) [21:33:18] Any chance you could zoom one of the squat white euplectellid sponges with the big osculum? There are a lot of them down there. [21:33:31] any water samples yet? [21:33:36] Hormathia sp anemone [21:34:10] steve. When we fist landed two hours ago [21:34:23] That white sponge above it is a good example [21:36:07] heatherjudkins leaves the room [21:37:07] It has a stalk! [21:37:30] LAT : 26.959146 , LON : -168.883304 , DEPTH : 1538.3059 m, TEMP : 2.48813 C, SAL : 34.55869 PSU, DO : 2.10389 mg/l, TURBIDITY : 0.6654 FTU [21:37:43] kennethsulak leaves the room [21:37:43] @Brian Thanks. If you enter a higher-density patch of anything I would pop another. No urgency. [21:37:47] Great shot, many thanks [21:37:59] will do [21:38:26] Pterasterid? [21:38:38] lindasunderland leaves the room [21:41:52] the feeding traces could be from those chitons we keep seeing [21:42:30] LAT : 26.95915 , LON : -168.883185 , DEPTH : 1531.8576 m, TEMP : 2.48103 C, SAL : 34.56067 PSU, DO : 2.10521 mg/l, TURBIDITY : 0.6654 FTU [21:43:21] narco [21:43:35] Solmundaegina? [21:44:03] Nice one. Solmundaegina I think. Newly described genus in 2017 by me :-) [21:44:49] The basket star is Ophiocreas oedipus. It is cosmopolitan just like Metallogorgia. You always see them with Metallos [21:46:35] davidjourdan leaves the room [21:47:31] LAT : 26.959121 , LON : -168.883087 , DEPTH : 1531.3187 m, TEMP : 2.4847 C, SAL : 34.55953 PSU, DO : 2.10723 mg/l, TURBIDITY : 0.6654 FTU [21:47:50] georgematsumoto leaves the room [21:49:21] FYI the spiky squat lobster is a different species of Uroptychus that is only found on black corals, like this Umbellapathes. [21:50:07] heatherjudkins leaves the room [21:50:38] christophermah leaves the room [21:50:43] should we collect the black coral Uro if we see it again? [21:51:02] Victorgorgia and baby Metallo [21:51:34] I think that Umbellapathes has been collected a bunch of times. I have personally collected 2 of those back in 2003 [21:52:08] @Brian The Uroptychus is going to be described. There are 2 specimens in the MCZ collection but none at the US national collection. I think it would be a really great addition to the USNM if you could! [21:52:32] LAT : 26.959165 , LON : -168.883051 , DEPTH : 1531.5042 m, TEMP : 2.48552 C, SAL : 34.55886 PSU, DO : 2.08745 mg/l, TURBIDITY : 0.6838 FTU [21:53:10] Sorry, misunderstood. You were talking about the squat [21:53:22] I think Tina is interested in collecting yesterday's Lillipathes/Trissopathes. [21:54:06] @Sara ha! don't worry.. that was what they called the Chris Mah Curse.. Sea stars only appeard whenever I walked away! [21:54:25] davidjourdan leaves the room [21:55:03] it's nature laughing at us! as it should :-) [21:55:38] There's so muhc joy to be had in what we do. : ) [21:55:41] christophermah leaves the room [21:55:56] Yes! [21:56:10] Ha ha. do you WANT me to ask for a Hymenaster collection? [21:56:13] Probably looking at the side of a dike that's mostly horizontal [21:56:21] yep, dike [21:56:34] CHRIS if you want a hymenaster for science i'd be thrilled but the SDMs might throw me off the boat [21:57:32]