hell·bend·er (hěl'běn'dər) n. A large aquatic salamander (Cryptobranchus alleganiensis) of the eastern and central United States. Also called mudpuppy.
mud·puppy also mud pup·py (mŭd'pŭp'ē) n.
pl.mud·pup·pies also mud pup·pies
Any of several large North American salamanders of the genus Necturus, especially N. maculosus, that live in damp regions and have conspicuous clusters of dark red external gills. Also called water dog.