Approximately 596 sq mi / 381,681 acres.
Houston and Geneva Counties AL; Jackson County FL.
Jackknife Crayfish, Peninsula Crayfish.
Ironcolor Shiner, Dusky Shiner, Bluenose Shiner.
Rayed Creekshell, Chipola Slabshell, Inflated Spike, Shinyrayed Pocketbook, Gulf Moccasinshell, Oval Pigtoe, Sculptured Pigtoe, Downy Rainbow (H)
(H) = Historic (species historically occurred in the SHU or SRRU but, it has either not been collected in a number of years, and may be considered extirpated, or the species could be present but there aren’t recent records to document its presence).
Chipola Slabshell, Shinyrayed Pocketbook, Gulf Moccasinshell, Oval Pigtoe.