Amphibians Necturus
Amphibians Necturus are a genus of aquatic salamanders commonly known as waterdogs or mudpuppies. They have external gills throughout their lives and are typically found in freshwater habitats such as rivers, lakes, and streams. Necturus species have slender bodies, four legs, and a long tail, with some individuals reaching lengths of up to 16 inches. They are nocturnal predators, feeding on small fish, insects, worms, and crustaceans. These amphibians are important indicators of water quality and ecosystem health.