Weird underwater animals like the blackmouth sea cucumber (Pearsonothuria graeffei) feed on the surface of coral reefs. Red Sea, Egypt, June.

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Photo credit: © Toby Gibson / Alamy / Afripics
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Keywords: animal, appendages, behaviour, blue, brown, colours, coral, egypt, environment, feeding, habitat, head, holothuroidea, invertebrate, marine, mouthparts, pattern, red, reef, scene, sea, sealife, shape, spiny, textured, ugly, underwater, weird, wide, wild, wildlife