Crabs belong to the most diverse group of marine invertebrates, indeed the most diverse group of marine
lifecrustaceans. Crabs, like all crustaceans, have a hard shell and jointed legs. Their body plan is based on
variations of the basic leg design. The mouthparts are tiny pincers that break off food and then even smaller
appendages waft the floating particles into the mouth. Most crab species are scavengers, although a few are
parasites of fish, mollusks and even other crustaceans. Crabs are economically important in other parts of the world
but in the Galapagos there are no species considered worth harvesting.
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