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Channel clinging crab
Mithrax spinosissimus
(Lamarck, 1818)

The largest spider crab in the region. The nearly circular carapace, legs and claws all bear spines and tubercles, those on the claws form a single row along the upper edge of the hand. The color of the carapace and walking legs is reddish-brown, the claws are purplish-gray.
Size: carapace up to 18 cm wide. When outstretched, the claws can span up to 60 cm.

It lives in and around rocks and rubble in shallow waters. Nocturnal.
Depth: ranges from 3 m down to 40 m.

Common to occasional all throughout the Caribbean.

Channel clinging crab (Mithrax spinosissimus)