Keishu Asada
@CephWarden
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A warden of Sand Quentin. Now mostly posting on BlueSky. Marine Fieldwork Specialist at the Okinawa Institute of Science and Technology (OIST)
Joined April 2019
The invisible glory of Octopus cyanea (the Day Octopus)! Can you see it before it moves? #CephalopodWeek #cephalopod #octopus @TheOctoNation @scifri
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This jellyfish got a tentacle snagged on a coral, now looks like a strange balloon dancing in the sunshine
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A little purple fairy fluttering through the reef, the batwing sea slug Sagaminopteron ornatum. Perhaps my favorite sea slug. Filmed in slow motion.
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After over 20 years and 1000 dives, I finally went diving in my native Hokkaido. Under the ice in Shiretoko, water temperature -2C. Music: Ice Age (deadmau5 remix) by How to Destroy Angels
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A ghost pipefish. When something so beautiful tries so hard not to be seen
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An odd looking siphonophore, probably Abylopsis tetragona. I've seen a few types of these siphonophores that come in this sort of transparent 'box' but this was by far the largest at about 5cm
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Hiding at the water's edge. Sorry buddy, but you were blocking my exit!
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The remarkable demon stinger. So hard to see at first but it knows how to make itself be seen when it wants to. I don't get tired of watching it walk with its odd 'fingers'.
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This thing looks like the body broke off of a toy bug, leaving only the legs. Yet it is as complete as you or me. A sea spider.
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This reddish furtive octopus has been a common sight in the reefs at night lately. But I have no idea what species it is. I've seen it put on a white spot in the middle of its face sometimes but otherwise shows no particular body patterns that I've seen.
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This anemone planted perfectly on the front of this sea cucumber as if it's part of the animal
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A ghost pipefish, looking exactly like a broken blade of dead seagrass, complete with crustose overgrowth
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Tree lizards of the Yanbaru. I think we counted 17 on this one trail.
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