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That is a hyperiid amphipod. So
this is basically the

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inspiration for the alien in
Alien. Yeah I think it's rare

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that you see one animal wearing
another animal as a hat. Not in

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the deep sea. This would
normally be a pelagic organism

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of its own. It's a zooplankton
that would be a filter feeder.

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A salp or salp chain. These are
planktonic tunicates. Um if

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you've seen a sea squirt,
you'll know what a tunicate is.

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This is a relative that lives
in the water column. It's

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another kind of filter feeder.

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Can you explain why it takes it
over? It will capture those

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salps and basically rip the
inside of the salp out but keep

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enough of the cells in the
inside that it's more or less

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alive and then uses the salp as
its own little house.