The Red Reef Hermit Crab (Dardanus arrosor) is a decapod crustacean in the Diogenidae family of crabs. It is also known as the Mediterranean Hermit Crab.
The Red Reef Hermit Crab has a beige-coloured shell, called a carapace. The body of the Hermit Crab is hidden in the shell. The colour of its body varies from bright red to bright orange. Its eyes are at the tips of two eyestalks. The eyestalks are streaked red and white, and the eyes are bluish. It is a decapod, which means that it has ten appendages (two claws and eight legs). Its two red claws have a black or yellow tip. The claws have hair-like spines and warty tubercules. The left claw is larger than the right claw.
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