[09:26:35] DIVE01 test message from the Okeanos Explorer [09:44:50] EX2206_DIVE01 ROV powered off [10:51:03] marinacarreirosilva leaves the room [11:09:18] ericfielding leaves the room [11:10:28] EX2206_DIVE01 ROV Launch [11:19:07] EX2206_DIVE01 ROV on Surface [11:19:49] EX2206_DIVE01 ROV Descending [11:20:42] LAT : 38.159421 , LON : -26.236086 , DEPTH : 19.4747 m, TEMP : 22.26673 C, SAL : 36.10515 PSU, DO : 7.46796 mg/l, TURBIDITY : 0.757 FTU [11:25:43] LAT : 38.158437 , LON : -26.236217 , DEPTH : 54.9392 m, TEMP : 18.23372 C, SAL : 36.04358 PSU, DO : 8.19053 mg/l, TURBIDITY : 0.9402 FTU [11:30:44] LAT : 38.158216 , LON : -26.236064 , DEPTH : 174.7933 m, TEMP : 14.84013 C, SAL : 35.96535 PSU, DO : 7.17353 mg/l, TURBIDITY : 0.9035 FTU [11:35:45] LAT : 38.158099 , LON : -26.235991 , DEPTH : 322.5024 m, TEMP : 13.2814 C, SAL : 35.74194 PSU, DO : 6.7505 mg/l, TURBIDITY : 0.9341 FTU [11:36:13] ericfielding leaves the room [11:40:45] LAT : 38.158005 , LON : -26.236009 , DEPTH : 476.3592 m, TEMP : 12.05458 C, SAL : 35.58238 PSU, DO : 6.57623 mg/l, TURBIDITY : 0.9402 FTU [11:45:46] LAT : 38.157905 , LON : -26.235997 , DEPTH : 616.1262 m, TEMP : 10.44022 C, SAL : 35.44657 PSU, DO : 6.08468 mg/l, TURBIDITY : 0.928 FTU [11:50:47] LAT : 38.157845 , LON : -26.236019 , DEPTH : 769.6032 m, TEMP : 8.94949 C, SAL : 35.37524 PSU, DO : 6.05278 mg/l, TURBIDITY : 0.9341 FTU [11:52:37] neilmitchell leaves the room [11:55:48] LAT : 38.157905 , LON : -26.235928 , DEPTH : 918.453 m, TEMP : 8.72858 C, SAL : 35.51132 PSU, DO : 6.072 mg/l, TURBIDITY : 0.928 FTU [12:00:48] LAT : 38.157879 , LON : -26.235913 , DEPTH : 1064.7028 m, TEMP : 7.82155 C, SAL : 35.42516 PSU, DO : 6.44095 mg/l, TURBIDITY : 0.9341 FTU [12:03:25] kennethsulak leaves the room [12:05:49] LAT : 38.157892 , LON : -26.23592 , DEPTH : 1219.0803 m, TEMP : 6.49864 C, SAL : 35.24766 PSU, DO : 6.96404 mg/l, TURBIDITY : 0.9341 FTU [12:10:50] LAT : 38.157889 , LON : -26.235848 , DEPTH : 1369.2354 m, TEMP : 6.19031 C, SAL : 35.22911 PSU, DO : 7.14158 mg/l, TURBIDITY : 0.928 FTU [12:10:52] joanaxavier leaves the room [12:13:16] joanaxavier leaves the room: Replaced by new connection [12:15:51] LAT : 38.157883 , LON : -26.235857 , DEPTH : 1517.8102 m, TEMP : 5.62407 C, SAL : 35.17368 PSU, DO : 7.38351 mg/l, TURBIDITY : 0.9585 FTU [12:16:25] kennethsulak leaves the room [12:20:06] marinacarreirosilva leaves the room [12:20:51] LAT : 38.157903 , LON : -26.235955 , DEPTH : 1667.818 m, TEMP : 5.16665 C, SAL : 35.10122 PSU, DO : 7.58892 mg/l, TURBIDITY : 0.928 FTU [12:21:49] joanaxavier leaves the room [12:23:38] joanaxavier leaves the room: Replaced by new connection [12:25:52] LAT : 38.157871 , LON : -26.236001 , DEPTH : 1814.0311 m, TEMP : 4.96525 C, SAL : 35.07326 PSU, DO : 7.6802 mg/l, TURBIDITY : 0.9219 FTU [12:28:09] sign in test [12:30:53] LAT : 38.157928 , LON : -26.23611 , DEPTH : 1958.122 m, TEMP : 4.86783 C, SAL : 35.06014 PSU, DO : 7.72696 mg/l, TURBIDITY : 0.928 FTU [12:32:10] Hi Kenneth! [12:32:20] Bom dia all! [12:34:02] joanaxavier leaves the room [12:35:30] Bom dia everyone! [12:35:32] Hi Neil - are you also on the OkEx call? [12:35:53] LAT : 38.157916 , LON : -26.235975 , DEPTH : 2110.1145 m, TEMP : 4.80744 C, SAL : 35.05124 PSU, DO : 7.70566 mg/l, TURBIDITY : 0.9219 FTU [12:36:18] neilmitchell leaves the room [12:36:48] joanaxavier leaves the room: Replaced by new connection [12:37:09] Hello everyone [12:37:38] Bom dia from Faial Island! [12:38:42] EX2206_DIVE01 ROV on Bottom [12:39:27] kennethsulak leaves the room [12:40:17] cirrate octopod [12:40:53] LAT : 38.158195 , LON : -26.236189 , DEPTH : 2150.854 m, TEMP : 4.78998 C, SAL : 35.04877 PSU, DO : 7.71746 mg/l, TURBIDITY : 0.9158 FTU [12:41:13] I use "octopus" for the genus Octopus [12:43:12] Hi everyone! [12:44:21] just caught the tail end of that. Was that cirrate black? [12:44:24] neilmitchell leaves the room [12:44:48] joanaxavier leaves the room [12:45:11] very dark red [12:45:54] LAT : 38.15826 , LON : -26.236408 , DEPTH : 2147.3849 m, TEMP : 4.79743 C, SAL : 35.05007 PSU, DO : 7.71447 mg/l, TURBIDITY : 0.9158 FTU [12:47:03] ok so just in shadow or a distance away? [12:47:32] sponge and a few elpiid holothurians [12:47:33] line of holes [12:48:39] nemertean worm [12:48:42] Hi! good Sunday afternoon! [12:49:20] that is the nemertean [12:49:47] good morning Dhugal and Manuel! [12:49:58] joanaxavier leaves the room [12:50:01] G'day and konnichi-wa [12:50:55] LAT : 38.158303 , LON : -26.23642 , DEPTH : 2146.0806 m, TEMP : 4.79037 C, SAL : 35.0481 PSU, DO : 7.73577 mg/l, TURBIDITY : 0.9219 FTU [12:51:29] Hello all [12:53:42] Aliens running a giant pizza cutter over the seafloor [12:54:15] they could also be fluid escape features along a crack – but I agree that it is probably biological [12:54:48] Hello Asako. Burning the midnight oil again! [12:55:07] what intrigues me if these would be fluid escape features is the constant with, regularity of the "holes" [12:55:31] *width and length [12:55:35] christarabenold leaves the room [12:55:53] Hi Dhugal! just wake up from nap! [12:55:56] LAT : 38.158417 , LON : -26.23646 , DEPTH : 2141.9068 m, TEMP : 4.79595 C, SAL : 35.04813 PSU, DO : 7.7165 mg/l, TURBIDITY : 2.1368 FTU [12:56:52] anenome or soft coral? [12:57:07] Hard to believe that such highly linear and regular and rectangular holes could be biological?? [12:57:08] Xenophyophore in front of it [12:57:19] I think they are burrow holes of an amphipod. The closeup showing a narrow channel on one side of the hole is about the right size for a large flat (side to side) amphipod [12:57:28] octocoral for me [12:57:45] similar to Shinkaiya lindsayi [12:57:46] leswatling leaves the room: Replaced by new connection [12:59:42] I agree it could be consolidated sediment [13:00:00] rattail [13:00:56] LAT : 38.158492 , LON : -26.236381 , DEPTH : 2133.415 m, TEMP : 4.79934 C, SAL : 35.05024 PSU, DO : 7.74802 mg/l, TURBIDITY : 1.1233 FTU [13:01:42] Fish is a macrourid - probably Ventrifossa. A much closer zoom in upon the head of fishes is needed if they are to be identified definitively [13:02:48] looks like a Radicipes [13:02:49] joanaxavier leaves the room: Replaced by new connection [13:02:52] To ID a soft coral, it is often necessary to zoom in closely to examine sclerites, nodes, branching pattern, polyps - ditto for fishes: head spines, scales, barbels, pores, etc. [13:03:42] this morelike Metallogorgia [13:03:57] it would be useful to collect one of these light-coloured rock – they could also be consolidated pyroclasts (rich in pumice) [13:04:10] another double headed Metallogorgia, and dying, I think [13:04:12] Shrimp -- Nematocarcinus? [13:04:20] Chrysogorgiid, Metallogorgia but branching.not healthy [13:05:30] Hi Les! [13:05:57] LAT : 38.158521 , LON : -26.23645 , DEPTH : 2127.5525 m, TEMP : 4.79475 C, SAL : 35.05029 PSU, DO : 7.71701 mg/l, TURBIDITY : 0.9341 FTU [13:06:09] Les - Metallo/Chryso was weird, widely spaced and closed up polyps [13:06:25] Hi Ken and Asako, [13:06:38] Dandelion [13:06:40] Dandilion siphonophore? [13:06:47] rhodaliid siphonophore [13:06:52] the light coloured rocks are not sediments – but pyroclasts, I believe [13:06:57] Yeah, the animal is either not gettng enough food, sort of like we saw in the Bahamas, or is degenerating [13:07:00] pumice rich pyroclasts [13:07:07] Hi all, The black whip coral was a Sticopathes [13:07:17] really common in Madeira [13:07:27] marinacarreirosilva leaves the room [13:07:27] Also, note that even with two parasols, only one Ophiocreas, which is really interesting [13:07:38] black coral [13:07:59] above the crinoid [13:08:08] Not that many rhodaliids known from this deep and not near a hydrothermal vent.. [13:08:28] So - I continue to be perplexed by the soft coral symbiont brittlestars/snakestars. I do not believe they can be particulate feeders. If they were, why not coil tight with just one arm to hang on - and extend all the others to feed. Often all the arms are tightly coiled, none extended [13:08:50] these are likely pyroclasts, hydromagmatic pyroclasts from shallower waters, full of palagonite [13:09:44] is this max zoom? [13:09:49] It looks indeed the rock is a susrtseyan tuff [13:10:22] *surtseyan tuff [13:10:26] @Ken, there is one study of a shallowish water snake star from NZ fjords. It apparently was getting nutrition by keeping the host black coral clean of sedimenting particles [13:10:48] Hi Debbie, I am here, but keep getting bumped out of the chat. Should there be a sample of the white rock taken - from Ricardo's comment it sounds interesting. cheers, neil. [13:10:58] LAT : 38.15862 , LON : -26.23656 , DEPTH : 2128.2459 m, TEMP : 4.79841 C, SAL : 35.05044 PSU, DO : 7.72352 mg/l, TURBIDITY : 0.9158 FTU [13:11:25] yes, a sample would be great [13:11:36] thanks, neil and ricardo. I am enjoying the geology help! I will ask about a sample [13:11:51] Thanks Les [13:11:52] Thanks ;-) [13:12:15] whats this white branching ?coral? [13:12:38] If the snake stars are cleaning the colony that might explain why there is only one and always only per host colony [13:13:13] The critters seem to prefer the non-basaltic rock [13:13:21] Anyone having trouble with getting bumped off the chat, switch browsers. Netscape/Firefox works well. [13:13:59] @mike it's also happening to me which is very annoying [13:14:05] or pidgin messenger [13:14:39] it is probably friable [13:15:04] there are other pieces around [13:15:34] can you zoom on those rocks? [13:15:50] some of those layers are coarse and look like pumice accumulations [13:15:58] LAT : 38.158598 , LON : -26.236313 , DEPTH : 2124.3734 m, TEMP : 4.79776 C, SAL : 35.05148 PSU, DO : 7.73975 mg/l, TURBIDITY : 0.9219 FTU [13:16:05] more of the light-colored rocks here [13:16:30] neilmitchell leaves the room [13:17:03] marinacarreirosilva leaves the room [13:17:36] looks good [13:17:51] kennethsulak leaves the room [13:18:14] laser dots are 10 cm apart? [13:18:21] fish in cam2 [13:19:33] Tina Molodtsova id black coral as Leiopathes aff glaberima [13:20:07] hard as a rock, as it were.... [13:20:13] these indeed are not friable [13:20:59] LAT : 38.158609 , LON : -26.236382 , DEPTH : 2125.4191 m, TEMP : 4.79693 C, SAL : 35.05006 PSU, DO : 7.74776 mg/l, TURBIDITY : 0.9158 FTU [13:21:18] I believe we have 2 different light coloured lithologies: more yellow palagonitic tuffs and whiter possible carbonates [13:23:55] neilmitchell leaves the room [13:24:00] joanaxavier leaves the room [13:24:35] the rock might be a volcanic agglomerate [13:24:42] i.e. pyroclasts [13:24:50] looks like lichens [13:25:40] yes, they came from above [13:25:59] LAT : 38.158639 , LON : -26.236433 , DEPTH : 2122.4084 m, TEMP : 4.79617 C, SAL : 35.04977 PSU, DO : 7.71421 mg/l, TURBIDITY : 0.989 FTU [13:26:19] they were formed in shallower waters, most probably [13:26:25] Is it known what the eruptive source of these fall deposits is? [13:26:30] many of the rocks are rounded, so they must have be rolling around a bit [13:27:34] (Tina) unbranched whip black coral Sticopathes we saw earlier was Sticopathes cf. flagellum [13:27:40] the tuffs look like fine-grained layers (palagonized) and the coarser whiter layers possibly are pumice accumulations [13:27:58] so shallower water explosive eruptions were the source of that, i believe [13:28:31] This area has probably experienced several magnitude >6 earthquakes over the past few thousand years, hence shaking rocks downhill. [13:28:35] ricardo, what depth might the volcanism have occurred at? [13:29:02] less than 500 m, possibly above 200 m [13:29:03] marinacarreirosilva leaves the room [13:29:19] (Tina) what are yellowish things left from sponge? [13:29:24] if surtseyan, less than 100 m even [13:30:15] irissampaio leaves the room [13:30:43] neilmitchell leaves the room [13:31:00] LAT : 38.158782 , LON : -26.23643 , DEPTH : 2119.3046 m, TEMP : 4.79918 C, SAL : 35.05055 PSU, DO : 7.70901 mg/l, TURBIDITY : 0.9219 FTU [13:31:31] oh its small. [13:31:44] (Tina) I think they were pieces of scleractinina. but yellowish [13:32:09] ericfielding leaves the room [13:32:28] 12-15 cm or so? [13:34:42] neilmitchell leaves the room [13:34:42] joanaxavier leaves the room: Replaced by new connection [13:34:55] kaseycantwell leaves the room [13:35:00] irissampaio leaves the room [13:35:47] (Tina) ask, if mural of OkEX is on the website?) they have very nice tradition at Faial)) [13:36:00] LAT : 38.158711 , LON : -26.236422 , DEPTH : 2120.9029 m, TEMP : 4.79579 C, SAL : 35.05055 PSU, DO : 7.73421 mg/l, TURBIDITY : 0.9829 FTU [13:36:24] @Les did you see the single large polyp earlier?? Tina says that it might be Kophobelemnon [13:38:11] neilmitchell leaves the room [13:39:13] ericfielding leaves the room [13:40:46] joanaxavier leaves the room [13:41:01] LAT : 38.158742 , LON : -26.236325 , DEPTH : 2116.3629 m, TEMP : 4.80493 C, SAL : 35.05119 PSU, DO : 7.71066 mg/l, TURBIDITY : 0.9524 FTU [13:42:03] marinacarreirosilva leaves the room [13:42:55] that's great! [13:44:33] At least the rock won't stick to the jaws [13:44:36] the coarser grained ones look like consolidated pumice [13:44:50] thomasmorrow leaves the room [13:45:02] thay's fantastic! Thanks! [13:45:26] hope that worked for all! [13:45:48] kaseycantwell leaves the room [13:46:02] LAT : 38.158915 , LON : -26.236378 , DEPTH : 2112.2604 m, TEMP : 4.80317 C, SAL : 35.05175 PSU, DO : 7.74624 mg/l, TURBIDITY : 1.685 FTU [13:46:18] neilmitchell leaves the room [13:46:34] they are special because they probably are a record of explosive eruption from shallow water eruptions [13:47:00] could you zoom in on the coarser grained? [13:47:43] indeed tuffaceous or sediment [13:47:54] with wave stratifications [13:48:07] rock or sediment for the zoom? [13:48:17] coarse grained rock [13:48:23] to the left [13:48:30] nice layering in the rock there [13:48:33] no problem [13:48:39] thanks [13:49:14] I have seen rocks like these onshore – in Flores Island! [13:49:36] better Metallogorgia [13:49:50] the rocks were eroded and transported from a location further up [13:50:55] perfect - thanks [13:51:02] LAT : 38.158992 , LON : -26.236361 , DEPTH : 2108.7963 m, TEMP : 4.80733 C, SAL : 35.05196 PSU, DO : 7.72248 mg/l, TURBIDITY : 0.9219 FTU [13:51:11] they were consolidated prior collapse and transport [13:51:36] so not contemporaneous of the eruptive process, but these rocks fell after consolidation [13:51:51] thank you [13:52:53] Cerianthus [13:53:00] tube anemone [13:53:01] cerianthid [13:53:09] and xenophyophore [13:53:10] leswatling leaves the room [13:53:14] The layered rocks seem likely to have been deposited in air or shallow water, then broken off and fell down the slope to here. [13:53:30] agree [13:53:32] exact the depth for that tube anemone [13:54:02] that is why they are so significant [13:54:06] @Asako 2095 m [13:54:24] thanks!! [13:54:29] 2105 m [13:54:35] sorry about that! [13:54:44] Thank you Kasey! [13:54:54] this depth zone is what we could see this type of tube anemone! [13:55:07] at the Pacific! [13:55:24] neilmitchell leaves the room [13:55:43] zoom in large rock in centre please [13:55:51] with the layering [13:56:03] LAT : 38.159265 , LON : -26.236729 , DEPTH : 2104.6481 m, TEMP : 4.80668 C, SAL : 35.05133 PSU, DO : 7.7019 mg/l, TURBIDITY : 0.989 FTU [13:56:05] Yes, that layered rock is very interesting [13:56:10] marinacarreirosilva leaves the room [13:57:05] These rocks might have recently moved down-slope in an earthquake [13:57:15] these are definitively pyroclastic rocks of varying composition [13:57:20] Or a landslide [13:57:23] dhugallindsay leaves the room [13:57:54] (Tina) yes... we have seen it first in Pacific, thank in Gulf of Mexico and now at MAR [13:58:09] layered or coarse-grained [13:58:11] Many rounded rocks here [13:58:24] the first rock tube anemone we saw it jumped and was swimming away was Okeanos! [13:59:04] The rounded rocks have to be well-cemented [13:59:25] kennethsulak leaves the room [13:59:27] It is likely a scree slope. Any intact rocks should be at the top of slope. [13:59:43] yes, it could be either but probably are from shallow water [14:00:11] irissampaio leaves the room [14:00:20] we can see tentacle waving [14:00:32] octopus!! [14:00:36] Octopus arms? [14:00:38] Muusoctopus [14:00:49] possibly M. januarii [14:01:03] LAT : 38.1592 , LON : -26.236331 , DEPTH : 2098.0543 m, TEMP : 4.81538 C, SAL : 35.04785 PSU, DO : 7.72661 mg/l, TURBIDITY : 0.9219 FTU [14:02:17] neilmitchell leaves the room [14:02:33] can we move to look in the crevass at the Muusoctopus? [14:03:23] thank you [14:03:51] There is the eye of the octopus [14:04:31] taraluke leaves the room [14:04:34] The mantle is pretty bumpy for Muusoctopus [14:05:20] nice rock to the right [14:06:03] Octopus might have been bothered by the lights [14:06:05] LAT : 38.159177 , LON : -26.236455 , DEPTH : 2095.2585 m, TEMP : 4.81226 C, SAL : 35.05265 PSU, DO : 7.67484 mg/l, TURBIDITY : 0.928 FTU [14:08:02] ROV lights might have caused it to hide in the crevice [14:09:12] The mixture of different rock types suggests this is a landslide deposit [14:09:38] indeed, and it explains the shallower water lithologies [14:10:27] joanaxavier leaves the room [14:11:03] marinacarreirosilva leaves the room [14:11:05] LAT : 38.159333 , LON : -26.236382 , DEPTH : 2089.1313 m, TEMP : 4.81335 C, SAL : 35.05233 PSU, DO : 7.67593 mg/l, TURBIDITY : 1.4835 FTU [14:12:54] kennethsulak leaves the room [14:13:17] Stylasteridae [14:13:24] I have really choppy video(( [14:13:42] Crypthellia [14:13:47] I suspect the pumice is from the sharp shallow ridge to the NE, but the fault has exposed both those deposits and underlying older basalt. [14:14:15] yes, it makes sense [14:14:51] pumice (if confirmed) come from eruptions similar to those in Tonga that produce the pumice rafts [14:15:21] @Iris, thanks! [14:15:35] but these seem welded together - can they become welded when deposited in water? or only subaerial? [14:15:46] neilmitchell leaves the room [14:15:55] irissampaio leaves the room [14:16:04] it is possibly just compaction and alteration [14:16:07] LAT : 38.159311 , LON : -26.236312 , DEPTH : 2086.8461 m, TEMP : 4.8133 C, SAL : 35.05269 PSU, DO : 7.69434 mg/l, TURBIDITY : 1.0623 FTU [14:16:23] that can happen in water [14:17:37] i don't think is welded, just very consolidated [14:18:19] there are also basaltic tuffs, it seems, but less common [14:18:54] can you zoom on the rock in front, please? [14:19:42] Is there higher resolution bathymetry for this area? [14:20:02] neilmitchell leaves the room [14:20:03] ricardo, which rock? [14:20:10] (Tina) Pentametrocrinus? [14:20:24] any of the light coloured coarser ones [14:20:54] (the delay in the communication does not allow us to interact on time with the image) [14:21:06] LAT : 38.15945 , LON : -26.236378 , DEPTH : 2081.9655 m, TEMP : 4.81872 C, SAL : 35.05352 PSU, DO : 7.69638 mg/l, TURBIDITY : 0.9524 FTU [14:21:29] joanaxavier leaves the room: Replaced by new connection [14:22:16] it is beacuse, pribably, this is a very recent landslide [14:22:26] The corner of the rock had a nice fracture surface. [14:22:35] just wasn't time enough for colonization [14:22:35] irissampaio leaves the room [14:22:41] threadleg shrimp, Nematocarcinus [14:24:47] neilmitchell leaves the room [14:25:15] According to Gleadall (2013), Joubin (1900) found Muusoctopus januarii near the Azores. [14:25:52] yes!! [14:26:03] I would save sampling time for the top where rocks could be in situ ? [14:26:08] LAT : 38.159439 , LON : -26.236234 , DEPTH : 2076.6629 m, TEMP : 4.82178 C, SAL : 35.05452 PSU, DO : 7.68999 mg/l, TURBIDITY : 0.9341 FTU [14:26:09] That sharp fracture of the corner of the rock showed it was very solid [14:26:45] Yes, a rock with layering would be very informative [14:27:19] well, if a small rock is easier to pick up.... n. [14:28:02] So many rocks, so much sediment - so few benthopelagic or epifaunal megafauna. No benthic holothurians, few soft corals. All suggests a very oligotrophic, low productivity watermass [14:28:16] This pile of rounded rocks looks like it came from a river. [14:28:55] neilmitchell leaves the room [14:29:23] Right @ken, which explains also the gaunt looking Metallogorgia earlier [14:30:38] (Tina) unstable substrate probably is a reason of less corals [14:30:38] taraluke leaves the room [14:31:07] LAT : 38.15951 , LON : -26.23631 , DEPTH : 2071.5071 m, TEMP : 4.83518 C, SAL : 35.05089 PSU, DO : 7.69334 mg/l, TURBIDITY : 0.928 FTU [14:31:11] joanaxavier leaves the room [14:31:33] also true @Tina [14:32:42] michellescharer leaves the room: Replaced by new connection [14:32:47] Seems like the layered rocks are going to be similar at other depths [14:32:51] this is a recent landslide – almost no sediment in some places [14:33:54] neilmitchell leaves the room [14:34:19] Nice sponges!!! [14:34:47] irissampaio leaves the room [14:34:56] This rock must be more stable, covered with life [14:35:17] The shaggy sponge with the large oscule might be a Polymastia. [14:35:20] (Tina) dead Leiopathes [14:35:44] (Tina) yes, there is a piece alive [14:36:07] LAT : 38.159532 , LON : -26.236304 , DEPTH : 2068.2057 m, TEMP : 4.82835 C, SAL : 35.05417 PSU, DO : 7.71155 mg/l, TURBIDITY : 0.9219 FTU [14:37:06] good name for urchin sponge)) [14:37:33] common color pallet for encrusting sponges on basalts of the Azores [14:37:37] So, considering just how many very small encrusting sponges we're seeing on this boulder, I wonder if they're also on the smaller rocks. Or could it be a function of size of the boulder--and its relative "stability". [14:37:41] what is below urchin sponge? [14:37:53] joanaxavier leaves the room: Replaced by new connection [14:38:03] (Tina) may be anemone? [14:38:14] thats what we thought too [14:39:17] copy that Kasey [14:39:25] irissampaio leaves the room [14:40:35] Few small rocks also have them [14:40:42] when were the last erthquakes in this area? [14:41:02] The different video feeds have different delays in the audio [14:41:07] LAT : 38.159588 , LON : -26.236462 , DEPTH : 2066.8142 m, TEMP : 4.83157 C, SAL : 35.0535 PSU, DO : 7.727 mg/l, TURBIDITY : 0.9158 FTU [14:41:31] neilmitchell leaves the room [14:42:09] about the earthquakes: I do not know but possible a few decades at the most [14:43:29] marinacarreirosilva leaves the room [14:44:38] A lot more geology here [14:44:45] neilmitchell leaves the room [14:45:15] halosaur [14:45:33] Instructive to encounter that one large vertical wall basalt rock - heavily populated by sponges, [14:45:46] nice closeup of head. Ken will be happy. [14:45:56] amazing zoom as always [14:46:01] fish is the abyssal halosaur Halosauropsis macrochir. Nice imagery [14:46:08] LAT : 38.159687 , LON : -26.236327 , DEPTH : 2065.717 m, TEMP : 4.82846 C, SAL : 35.05513 PSU, DO : 7.70453 mg/l, TURBIDITY : 0.9096 FTU [14:46:37] This is a hoverer/drifter - descending to take in mouthfuls of sediment with its ventrally placed mouth [14:47:13] Also a typical fish of the continental rise and upper abyssal - circumglobal in distribution [14:47:53] (Tina) I heard about black ones but never have seen))) [14:48:11] Nifty to see how it uses those spread out pectoral fins a stabilizing and diving planes, using the very end of the long tail for slow propulsion [14:49:39] so many rocks here [14:50:17] According to the USGS, there was a magnitude 5.7 here in 1989. [14:51:08] LAT : 38.159716 , LON : -26.236335 , DEPTH : 2061.372 m, TEMP : 4.82846 C, SAL : 35.05408 PSU, DO : 7.69502 mg/l, TURBIDITY : 0.9158 FTU [14:51:20] In a totally black environment, vertical or angled hovering is common. Sediment with potential prey is detected by thousands of tiny sensory pores of the lateral line - arrayed on the underside of the snout [14:51:41] This rock pile again looks like a recent landslide deposit [14:52:23] No biology attached to the rocks [14:52:25] rising off bottom gets the animal - whether drifting holothurian or halosaur - into the higher velocity current using that to move the fish along with minimal swimming energy [14:52:32] timothyswain leaves the room [14:52:54] neilmitchell leaves the room [14:53:14] can you zoom on the yellow rock with the black stripe? [14:53:50] irissampaio leaves the room [14:53:51] near bottom of the [14:54:01] bottom center? [14:55:11] michellescharer leaves the room [14:55:16] these look like pyroclastic layers of varying composition [14:55:20] nice! each stripe is likely a volcanic eruption deposit [14:55:48] is that a sea cucumber? [14:55:49] but only a sample would confirm if the light-coloured material is pumice or sediment [14:56:09] LAT : 38.159732 , LON : -26.236365 , DEPTH : 2061.8155 m, TEMP : 4.83157 C, SAL : 35.05438 PSU, DO : 7.68403 mg/l, TURBIDITY : 0.9158 FTU [14:56:15] joanaxavier leaves the room [14:56:22] yep. definitely holothurian (sea cucumber) [14:56:26] i guess is pumice or finer pyroclasts of intermediate/acidic composition [14:56:28] (Tina) Brachyopod? [14:56:30] megancromwell leaves the room [14:56:48] thanks, ricardo and eric! do we want to sample one of the smaller ones if we can. i seriously don't think we will get to the top of the slope. [14:56:50] (Tina) Victorgorgia or Plexaurid? left [14:57:43] sure, go for it [14:58:25] kennethsulak leaves the room [14:58:33] timothyswain leaves the room [14:59:12] there it si [14:59:15] is [14:59:23] yes! [14:59:27] irissampaio leaves the room [14:59:42] bryozoan at the base? [14:59:53] we made it to the purple coral! [15:00:06] (Tina) I think it is stolonifera [15:00:19] (Tina) on somebody's stalk [15:00:24] That rock is really big [15:00:41] agree with Tina. we have seen such purple octo at the previous EX2205 [15:01:06] I think this is a Stoloniferan [15:01:10] LAT : 38.159759 , LON : -26.236372 , DEPTH : 2060.034 m, TEMP : 4.83814 C, SAL : 35.0544 PSU, DO : 7.71151 mg/l, TURBIDITY : 0.9341 FTU [15:01:20] tiny crinoid and.... [15:01:29] (Tina) it is growing in... like clusters) [15:01:50] beautiful purple coloration [15:02:55] arborescent foram was on that stalk? [15:03:01] irissampaio leaves the room [15:03:14] I mean on the stalk of purple stoloniferan [15:04:11] the first Stoloniferan on this dive/cruise I believe. [15:04:55] nice rock, also [15:05:47] no. we have seen Storonifera on the stalk at the previous EX2205. [15:06:04] several time. [15:06:10] LAT : 38.159791 , LON : -26.236393 , DEPTH : 2059.2352 m, TEMP : 4.83436 C, SAL : 35.05426 PSU, DO : 7.6817 mg/l, TURBIDITY : 0.9158 FTU [15:06:21] the first observation on EX2206 [15:06:42] Interesting to see the rock has yellowish clasts in a nearly white matrix. [15:06:55] Almost certainly pyroclastic deposit [15:07:00] kaseycantwell leaves the room [15:08:21] this is a ver recent landslide [15:08:38] its geological [15:08:43] megancromwell leaves the room [15:08:53] just a rock surfac [15:09:06] joanaxavier leaves the room: Replaced by new connection [15:09:36] kaseycantwell leaves the room [15:10:05] blue sponge?? [15:10:31] Oh, that is beautiful!!!! [15:11:11] LAT : 38.159817 , LON : -26.236276 , DEPTH : 2056.6755 m, TEMP : 4.82687 C, SAL : 35.0543 PSU, DO : 7.71443 mg/l, TURBIDITY : 0.9158 FTU [15:11:22] Hi @Shirley! we have seen this blue sponge at EX2205 as well. is it worth collect? [15:11:36] looks like another pyroclastic rock [15:11:58] Hi @Asako!!! These are very hard to collect. [15:12:08] with percussion marks from the landslide [15:13:00] Yes, looks almost like slickensides on the rock, from rocks hitting each other in the landslidel [15:13:32] @Shirly yes indeed....hard to collect.. [15:13:43] those black spots on the rock may be obsidian [15:14:22] many many pteropod shell, agree... [15:14:36] How wide is the suction tube? They may be able to slurp it up...carefully???? [15:16:04] we could crush and slurp sometimes... [15:16:12] LAT : 38.159816 , LON : -26.236365 , DEPTH : 2055.9015 m, TEMP : 4.86559 C, SAL : 35.03662 PSU, DO : 7.70051 mg/l, TURBIDITY : 0.9158 FTU [15:16:52] Ideally, there will be another one ON a rock, and you can get 2 samples in one--LOL! [15:17:44] exactly, shirley! [15:17:52] irissampaio leaves the room [15:18:30] taraluke leaves the room [15:18:57] kennethsulak leaves the room [15:19:02] joanaxavier leaves the room [15:21:13] LAT : 38.159932 , LON : -26.236324 , DEPTH : 2046.9303 m, TEMP : 4.82988 C, SAL : 35.05718 PSU, DO : 7.66527 mg/l, TURBIDITY : 0.9158 FTU [15:21:49] So in the perpetual absolute blackness of 2000+ meters, when I see a purple coral or a blue sponge - I wonder why. Hard to believe that such color is incidental to physiology. More parsimonious to hypothesize that there is a real function to producing physiologically expensive pigment [15:22:34] Interesting rock to the right that has very strong layering and broke into a flat slab [15:23:14] So when I see such glowing blue and purple - or yellow or red - I think of fluorescence - as per Eddie Widder. The pale blue light emitted by bioluminescent organisms is capable of stimulating fluorescence [15:24:09] ellenkenchington leaves the room [15:24:42] Would be nice to have a piece of that slab-like rock, but it looks much too big and probably won't break easily [15:24:44] timothyswain leaves the room [15:24:48] @Kenneth, I'll be back to you in a while, we are trying to not interfere too much with the pilot communications while they get ready for sampling [15:24:50] Reds (shrimps), oranges, and yellow make sense - they absorb blue light, helping to avoid detection when illuminated by a light-producing organism [15:24:53] (Tina) may be it is not expensive pigment - just a byproduct of something) [15:24:55] kaseycantwell leaves the room [15:26:13] LAT : 38.159924 , LON : -26.236294 , DEPTH : 2046.242 m, TEMP : 4.84694 C, SAL : 35.04219 PSU, DO : 7.70548 mg/l, TURBIDITY : 0.9219 FTU [15:27:17] Ken, I had the exact same question about why it would be blue. [15:29:20] irissampaio leaves the room [15:29:22] Certainly can't slurp the rock. [15:30:03] @Eric, don't give Deb any more ideas on how she can collect rocks :-D [15:30:18] @Joana lol [15:30:23] ha! [15:30:57] kaseycantwell leaves the room [15:31:06] Ah - I have heard that byproduct excuse a lot of times. Not often does nature tend that way. I would like to see OE dedicate a mission specifically to equipping the ROV with appropriate blue wavelength and UV lights, and camera filters - do down the depth horizons from where sunlight is totally absorbed (1100 m), then stepping down to 2000-3000m in an area rich in sponges and soft corals. My guess is that those with odd colors not used for camouflage - blue, purple, green - do indeed fluoresce. Also maybe many that are white. White flowers (to human eyes) under UV display colors and guide lines in UV (evolved for use in attracting bees, and other pollinators) [15:31:14] LAT : 38.159969 , LON : -26.236384 , DEPTH : 2045.6976 m, TEMP : 4.82911 C, SAL : 35.05593 PSU, DO : 7.67552 mg/l, TURBIDITY : 0.9158 FTU [15:32:10] shirleypomponi leaves the room [15:34:00] irissampaio leaves the room [15:35:03] joanaxavier leaves the room [15:36:03] deborahglickson leaves the room [15:36:14] LAT : 38.159974 , LON : -26.236348 , DEPTH : 2045.4454 m, TEMP : 4.85236 C, SAL : 35.05473 PSU, DO : 7.68498 mg/l, TURBIDITY : 0.9158 FTU [15:38:04] There's a sponge that occurs in the tropical western Atlantic (and likely elsewhere) in deeper water. It's bright yellow--similar color to the encrusting sponge we saw earlier--and the cells brightly fluoresce. Not coincidentally, the compound(s) these sponges produce are also fluorescent! [15:38:37] In humans, the compounds are antiviral and antiinflammatory--so what are they doing for the sponge? And THAT is another question! [15:40:55] The very first marine-derived compound came from a shallow water sponge! [15:41:07] It was discovered in the mid-1950's! [15:41:15] LAT : 38.159984 , LON : -26.236248 , DEPTH : 2039.8034 m, TEMP : 4.83212 C, SAL : 35.05554 PSU, DO : 7.66607 mg/l, TURBIDITY : 0.9158 FTU [15:41:19] interesting organisation of the particles [15:41:49] kennethsulak leaves the room [15:41:55] this is clearly a landslide deposit – very recent [15:42:12] are we going to see the headwall scarp? I do not know but likely [15:42:27] We lost an hour at the start of this dive, right? [15:42:43] confirmed Eric [15:42:49] the nature of the rock that composes the landslide debris is the most interesting feature so far [15:42:58] I remember that blind lobster, and how much you hated it, @Deb! [15:43:27] i did hate it. but i reallyl ike these rocks. [15:43:54] awesome. :) [15:44:50] looks like a kophobelemnon [15:44:59] Do we need the lasers off for the biology? They can be useful for us to size features in the rock and particles. [15:45:07] (Tina) may be Kophobelemnon.. [15:45:32] we will get them back on [15:45:36] they should be standardly on [15:45:39] (Tina) but with two polyps. normally they have two [15:45:47] occasionally coming off for pretty pictures [15:46:07] (Tina) siphonozoids are at the base of autozoids [15:46:16] LAT : 38.160083 , LON : -26.236218 , DEPTH : 2037.3076 m, TEMP : 4.82993 C, SAL : 35.05769 PSU, DO : 7.66887 mg/l, TURBIDITY : 0.9158 FTU [15:46:21] (Tina) have to be visible from opposite side [15:46:35] (Tina) ah, yes, here they are [15:46:53] lasers are bvack on [15:47:22] thomasmorrow leaves the room [15:47:29] Thanks, lasers help a lot to know rock sizes [15:48:04] irissampaio leaves the room [15:48:11] leswatling leaves the room [15:48:54] another holothurian [15:48:58] these are not the rocks I would expect in here, I will tell you [15:49:47] black coral whip? [15:50:05] sticopathes [15:50:06] joanaxavier leaves the room: Replaced by new connection [15:50:07] (Tina)(Kophobelemnon) there are several species reported with two polyps and they may be even synonyms [15:50:25] (Tina) in Atlantic the one reported is Kophobelemnon macrospinosum [15:51:03] marinacarreirosilva leaves the room [15:51:14] irissampaio leaves the room [15:51:17] LAT : 38.160128 , LON : -26.236294 , DEPTH : 2027.6739 m, TEMP : 4.83436 C, SAL : 35.05532 PSU, DO : 7.69408 mg/l, TURBIDITY : 0.928 FTU [15:51:28] michellescharer leaves the room [15:52:12] in the latest large earthquake in the area was in 1980, then there is a very good chance that this landslide was triggered then, i.e. that is the age of the landslide [15:52:16] Cerianthus [15:52:42] I believe on the rock [15:53:02] (Tina) third in this dive [15:53:13] Some dark coverings of the rocks here - iron-manganese crusts? Perhaps this is part of the slipped material that was originally exposed? [15:53:25]