Home Archived January 13, 2017

Shortcut to USGS Homepage

National Water Quality Assessment Program (NAWQA)

Tennessee River Basin Study                     


Photo Gallery

 image of a "hellbender" specimen

The hellbender (Cryptobranchus alleganiensis alleganiensis) often crawls along the stream bottom unnoticed, but to fishermen that frequent the smaller-more pristine streams of the Tennessee Valley, the “waterdog” or “grampus” is no surprise to a tangled fishing line. The hellbender is North America’s largest salamander, reaching lengths of nearly 30 inches.

Last Modified 7/3/01
maintainer rmitchel@usgs.gov