Cambarus tartarus, the Oklahoma cave crayfish,[1][2] is a species of crayfish in the family Cambaridae.

It is endemic to two caves in Delaware County, Oklahoma in the United States.

[3][4][1][5] The IUCN conservation status of Cambarus tartarus is "CR", critically endangered.

The species faces an extremely high risk of extinction in the immediate future.

This crayfish article is a stub.