A flat, rounded shell.A tail that's folded under the body.This is what a crab looks like, and apparently what peak performance might look like at least according to evolution.A crab-like body plan has evolved at least five separate times among decapod crustaceans, a group that includes crabs, lobsters and shrimp.
#effectively #relationships #flexibility #dramatically #generations #possibilities #straightforward #multiple-times #versatility #characteristic
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