Not all specimens upon which these maps are based have been verified. Mudpuppy, large tiger salamander larvae. Costal grooves inconspicuous, nearly hidden within skin wrinkles. Occasionally one gill opening is missing. Cavities under submerged rocks and logs are important as nest sites and daytime retreats.
Adults eat crayfish, small fish, snails, insects, worms, and tadpoles.
Reproduction occurs from August into October. Female lays 250-450 eggs in long beaded strings in gravel depressions excavated by male under large submerged rock or log. Male releases sperm over eggs in nest and remains to protect them during development. Slimy skin secretions are toxic and probably repel predatory fish. The only predator of large adults is man.