Good question. Algae come in all kinds of
shapes and sizes. Some algae, like the giant kelp
that live off the coast of California, are 50 feet
Some algae are even too small to see. Many
organisms live on the giant kelp. These organisms
include fish, lobsters, shrimp, sea slugs, snails,
crabs, other very small animals and many others.
Some organisms eat the giant kelp, like snails
and sea urchins. In fact, groups of sea urchins
have been known to eat whole kelp's forests. Many
organisms eat the algae that is too small to see
too. These organisms either filter them out of the
water, like clams and worms, or they eat them off
of rocks, like some snails and some fish. For
example, some people like to have cleaner fish in
their fish tanks to eat the small green algae, so
the water doesn't get green.
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