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Another incredibly elongate deep-sea stalked sponge! at 3093 m, east basin seamount, American Samoa #spongeThursday #Okeanos

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Yes. there are barnacles at 3100 meters! please make a note of it! #Okeanos east basin seamount, American Samoa

white stalked barnacle with feeding legs extended

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A fallen glass sponge showing off its holdfast! yes. glass fibers! very much like fiber optic cable! #spongeThursday #okeanos 3115 m east basin seamount, American Samoa

white sponge on right.. brown glass fibers to left

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A cool looking brittle star with a purple disk! We've seen quite a few of these so far! at about 3115 m, east basin seamount, American Samoa, #Okeanos

flat disk, purple disk brittle star on black rock

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OH WOW. A collection of NEOPILINA! A monoplacophoran! Collected by #Okeanos before in 2017,. east seamount, American Samoa #molluscmonday link.springer.com/article/10.1...

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A distinctively red synallactid sea cucumber, at about 3150 m eastern basin seamount, American Samoa, #Okeanos

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A brisingid, Freyella at 3175 m, east basin seamount, American Samoa with arms raised into the water to feed! #Okeanos

multi-armed sea star, orange with arms raised into water

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Another impressively large Saccocalyx stalked glass sponge, 3170 m east basin seamount, American Samoa #okeanos #spongeThursday

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Stalked glass sponge, Caulophacus, 3190 m east basin seamount, American Samoa #spongeThursday #okeanos

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oh wow. Sibogaster, following removal? this half fed whatever- foram test? remnant sponge? Biology of feeding! lovely observation! 3190 m east basin seamount, American Samoa

remant sediment feature.. possibly post-feeding from star

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A synallactid sea cucumber with translucent body, a bunch of tentacle twitching and a gut showing off its incipient poop! #Okeanos 3198 m east basin seamount, American Samoa

purple clear worm like animal with brown sediment on black rock

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Lovely brittle star at 3205 m.. looks like Ophiophyllum, eastern basin seamount, American Samoa

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A foraminferan test! 3185 m, east basin seamount, American samoa #Okeanos

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A lovely white sea anemone at 3210 m! east basin seamount, American Samoa #Okeanos

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A feather star hanging onto this big sponge stalk! 3215 m #okeanos east basin seamount, American Samoa

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Wow. A Caulophacus glass sponge, 10 FEET LONG! #okeanos east basin American Samoa, 3214 mor so

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SPONGE ON SPONGE action! Poliopagon growing on this dead sponge stalk, 3215 m east basin, seamount, American Samoa #Okeanos

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7 armed Freyastera/Freyella on this sponge stalk, 3215 m seamount, American Samoa

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A potentially new species of goniasterid sea star! Such a lovely white cookie! 3210 m #Okeanos east basin seamount, American Samoa!

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Weird 7 armed freyellid.. either Freyastera or Freyella! #okeanos east basin seamount, American Samoa

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BRITTLE STARS! vexing creatures with a gorgeous disk that has very adhesive arms! 3245 m East samoa basin seamount, American Samoa. collecting has become a challenge because they do NOT let go!

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MORE glass sponge love! 3245 m #Okeanos lovely fiber optic stalk! #spongeThursday

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Feather star perched on a possible bamboo coral, 3245 m East samoa basin seamount, #Okeanos #octocoral Friday

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GLASS SPONGE showing off a very fibrous stalk! 3255 m south samoa basin seamount, American Samoa #Okeanos #spongeThursday

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#Okeanos has reached BOTTOM! 3255 m south samoa basin seamount! American Samoa! the final dive of this season! Let's go!

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A glass sponge at 5207 m! #okeanos East Muliāva Abyssal Plain #spongethursday

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A cute little glass sponge in the Bolosominae, LOLLIPOP! depth is 5215. #okeanos East Muliāva Abyssal Plain #spongeThursday

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OH SWEET! this Freyastera has a big-ass polynoid scale worm in association! #okeanos East Muliāva Abyssal Plain, depth is 5225. The worms live in association possibly stealing food from the star

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Chris Mah @echinoblog.bsky.social · 10/09/2026

#OKEANOS #deepsea Sea Pen Umbelulla! 5230 m! East Muliāva Abyssal Plain #octocoralFriday

white five part "flower" head with a thin stalk

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Ha ha. Got home just in time to see #Okeanos pull up.BUT saw this HUGE monster of a benthic comb jelly at 5525 m! east basin nodule field, American Samoa

rabbit ears jelly with long tentacles on a stalk

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Chris Mah @echinoblog.bsky.social · 09/09/2026

FIRST black coral! Abyssopathes, a black coral from 5480 m.. interesting rib-cage like branching pattern! Okeanos American Samoa, central basin nodule field

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Chris Mah @echinoblog.bsky.social · 09/09/2026

#Okeanos Has reached BOTTOM! Here's a Bryozoan to start! 5480 m! Central Basin Nodule Field, American Samoa!

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JELLY! 5853 m Ultra Deep Basin, American Samoa, #Okeanos

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An ADORABLE little Sea Pig at 5853 m! #okeanos Ultra deep basin, American Samoa

4 legged on either side, small white sea cucumber feeding on deep sea bottom

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what say you? BRACHIOPOD Or BIVALVE! 5830 m #okeanos Ultra Deep Basin American Samoa #Okeanos

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Some kind of sea pig! 5857 m #okeanos Is this the poop spiral culprit?

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Interesting tube anemone? 5863 m Ultra Deep Basin American Samoa #okeanos

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A lovely carnivorous or cladorhizid SPONGE! 5865m Ultra Deep Basin American Samoa #Okeanos #spongeThursday!

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