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Sea Cucumber & Pearlfish
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Sea cucumbers are invertebrates that can
be found on the ocean floor or on the reef.
They have small suction-cup feet to help
them move. They breathe out of their anus and
can shoot out their internal organs when they
detect a predator. Then they regrow their
insides.
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The pearlfish is a long, slim fish.
They have no scales but they do have long
fins that run along the length of their bodies.
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Relationship:
Commensalism
"The pearlfish uses the sea cucumber for a
hide-out from predators.
The pearlfish will live in the sea
cucumber’s anus, backing into the hole
tail-first so its head can stick out."
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"When a predator of the pearlfish comes by, it will
bring its head in so it can’t be detected.
The sea cucumber is unaffected by this
activity."
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