An adult male of Pachycheles serratus with a malformation on the right cheliped was found during a collection of anomuran crabs in coastal waters of the peninsula de Macanao, Margarita island, Venezuela. The specimen was found at La Carmela beach (11º04'N–64°20’W), and featured a bifurcated fixed finger on the right cheliped.
Keywords: Caribbean, abnormal cheliped, teratology, Anomura, Pachycheles