Genus

Leptuca 

fiddler crabs

This is one of the genera that some members of the genus Uca has been placed.

Leptuca pugilator
Atlantic sand fiddler crab
crabs on muddy shore

Species of the Leptuca genus in the Wild Florida Photo database:

  Leptuca pugilator
Atlantic Sand Fiddler Crab

  Leptuca speciosa
Longfinger Fiddler Crab

The genus Leptuca is a member of the Ocypodidae - Fiddler and Ghost Crabs family.