- Eel-like salamander with long body and relatively short tail.
Small, lidless eyes.
Four reduced limbs, each with three toes.
External gills in larval stage, single gill slits as adults.
Fifty-seven to 60 costal grooves.
- Dark brown with a dark patch on throat.
Gray ventral surface.
Adult Amphiuma tridactylum can measure between 46-106 cm (18-42 in) in total length.
In the United States, the range of Amphiuma tridactylum begins from a point in southeast Missouri and spreads southward to the Gulf of Mexico.
Nocturnal and rarely seen out of water, Amphiuma tridactylum feeds on earthworms, crawfish, and small invertebrates and will hibernate in cold weather.
Breeding in Amphiuma tridactylum occurs from December to June. Internal fertilization occurs. Females lay 150-200 eggs in a strand that then sinks into the mud.
Strictly aquatic, Amphiuma tridactylum can be found in the muddy waters of ponds, ditches, and lakes.
The three-toed amphiuma is not a protected species in Texas and can be legally collected with a hunting license.
In Texas, Amphiuma tridactylum is found only in east Texas.