The biggest crab in the world, the Japanese spider crab, is capable of achieving a leg span of more than 13 feet (4 meters) across. Read on to get better acquainted with the Japanese spider crab ...

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They’re also one of the world’s largest arthropods, animals with no backbone, external skeletons, and multiple-jointed appendages. In this crab’s case, those appendages are its 10 legs.