Cambarus gentryi, the linear cobalt crayfish, is small burrowing species of crayfish in the family Cambaridae, notable for its blue carapace. It is endemic to Tennessee in the United States. Physical description Cambarus gentryi has a shell length of around and pincers about long. Its shell is cobalt blue in colour with orange or yellow to yellowish-green markings. Habitat The linear cobalt crayfish has been found in the Cumberland and Duck river basins in Tennessee. It forms complex burrows in damp soil, which often have two openings to the surface and have been found up to about in depth. Conservation status Cambarus gentryi is listed as least concern by the IUCN. References Cambaridae Crustaceans described in 1970 Freshwater crustaceans of North America Endemic fauna of Tennessee Taxa named by Horton H. Hobbs Jr.