Tidal-stream
Guides
Uca minax
red-jointed fiddler crab, brackish-water fiddler crab
Minuca minax is a fiddler crab species distinguished by its tolerance for low-salinity and freshwater habitats, extending farther inland than most congeners. Males possess one greatly enlarged claw with red joints, the source of its common name. Formerly classified in genus Uca, it was transferred to Minuca in 2016. The species is abundant in salt marshes and tidal streams along the U.S. Atlantic and Gulf coasts, with documented populations occurring more than 50 km from the sea.