 It can also be distinguished by its cone-shaped head and toe number—one-toed amphiumas have one toe on each foot as opposed to the two or three exhibited by other "Amphiuma" species.It is the smallest species in the genus "Amphiuma" with the average adult size being 8.5 inches (220 mm).One-toed amphiumas are generally known only to occur in parts of the Florida panhandle, extreme southern Georgia, and southern Alabama.