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Here is a quick clip of the sea urchin, Strongylocentrotus purpuratus, taken by Adrian Reich of the Wessel Lab at Brown University. You can see the animal's tube feet moving between its spines. Check out creaturecast.org/archives/1085-tube-vision to read about how urchins might use these feet and spines to focus light and see shapes around them. Together the structures might function like a large compound eye.This work is provided under a Creative Commons Attribution-Noncommercial Share-Alike license.
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Synaptula lamperti is not the primary subject of the video clip; the primary subject is Chaetodon kleinii (Klein's butterflyfish). Coral Sea, Duration 48 seconds
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Synaptula lamperti is not the primary subject of the video clip; the primary subject is Xestospongia testudinaria (Barrel sponge). Coral Sea, Duration 17 seconds
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South Pacific Ocean, Shot at night, Duration 9 seconds
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South Pacific Ocean, Shot at night, Duration 7 seconds
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Coral Sea, Duration 13 seconds
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Coral Sea, Duration 12 seconds
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South Pacific Ocean, Shot at night, Duration 7 seconds
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Coral Sea, Duration 7 seconds
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Colochirus sp. is not the primary subject of the video clip; the primary subject is Pseudocolochirus violaceaus (Sea apple). Indo-Pacific, Duration 34 seconds
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Coral Sea, Duration 54 seconds
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South Pacific Ocean, Shot at night, Duration 15 seconds
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South Pacific Ocean, Shot at night, Duration 13 seconds
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South Pacific Ocean, Shot at night, Duration 8 seconds
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South Pacific Ocean, Shot at night, Duration 18 seconds
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Synaptula lamperti is not the primary subject of the video clip; the primary subject is Xestospongia testudinaria (Barrel sponge). Coral Sea, Duration 16 seconds
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South Pacific Ocean, Shot at night, Duration 13 seconds
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Coral Sea, Duration 12 seconds
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Coral Sea, Duration 7 seconds
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Coral Sea, Duration 34 seconds
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South Pacific Ocean, Shot at night, Duration 17 seconds
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South Pacific Ocean, Shot at night, Duration 15 seconds
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Synaptula lamperti is not the primary subject of the video clip; the primary subject is Xestospongia testudinaria (Barrel sponge). Coral Sea, Duration 17 seconds
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South Pacific Ocean, Shot at night, Duration 13 seconds
