Urchin Flip-8x-silentloop.mp4 (VIDEO)

Smithsonian Tropical Research Institute

Caption

Normally, a sea urchin (Echinometra lucunter) can right itself as it does in this video, but when it doesn't have enough oxygen or is too hot, flipping over becomes more difficult.

Credit

Jarrod Scott, STRI

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Credit: STRI

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