Common Box Crab

Calappa hepatica

Identification: Colour varies, pale olive to olive-grey or olive-yellow, with flecking but not strong markings. Legs hidden under expanded flange at back of shell. To about 50 mm in carapace width.

Habitat and Range: On rocky and coral reefs, on sand or muddy-sand substrates, from shallow subtidal zone to 50 m. Tropical and subtropical Australia; Indo-Pacific from Red Sea to Clipperton Is., east Pacific.

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