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Another fascinating video, Bretwick! How do they hang on to a rock so firmly while eating? That must be a tremendous amount of pressure for their size, if you think about it. Can you imagine trying to eat your dinner, while being smacked in the face by a wave every few seconds? I suppose there are some advantages to having your skeleton on the outside, besides not getting wrinkles in old age 
!
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I was surprised how they clung on and not washed away too.
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It has always fascinated me how they are not swept away.
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