- any of several often large, aquatic salamanders of the genus Necturus, of eastern North America, having bushy, red gills and well-developed limbs.
- any of several North American salamanders of the genus Ambystoma.
- any aquatic North American salamander of the genus Necturus, esp N. maculosus, having red feathery external gills and other persistent larval features: family Proteidae
