Tags: Crustacean.
Cambarus zophonastes is a species of crayfish in the family Cambaridae. It is endemic to the state of Arkansas and is listed as critically endangered on the IUCN Red List. The crayfish is nicknamed the Hell Creek crayfish. The cave crayfish Cambarus zophonastes is a cave-adapted species that lacks pigment in the body and eyes. This crayfish is known from two caves Hell Creek Cave and Nesbitt Spring Cave.