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So holothurians or sea cucumbers, they typically don't move much. You can see. He's pretty happy there.

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And what we see the holothurian doing here again is consuming sediment.

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They have some really elaborate defense mechanisms.

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So, they are able to eviscerate their guts,for example, and that will then stick to the predator and confuse them.

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They can also swim over short distances to get away from things.