Hellbender

Cryptobranchus alleganiensis

The hellbender is North America's largest salamander, a flattened, fully aquatic amphibian of cool, fast-moving streams in the Appalachian, Ohio River, and Ozark drainages. Adults hide beneath large flat rocks by day and feed mainly on crayfish, using wrinkled skin folds to exchange oxygen with well-aerated water. The eastern and Ozark forms are often managed separately, and local names such as snot otter or Allegheny alligator reflect how often anglers notice this secretive animal only by accident.

Hellbenders are poor pet candidates and are protected or regulated across much of their range. Survival depends on clean gravel streambeds, stable cover rocks, and water that is not choked with silt from roads, development, or agriculture. Zoos, universities, and state agencies support head-starting, captive breeding, environmental DNA surveys, nest boxes, and disease monitoring where wild recruitment is low. People who find one while fishing should release it immediately, keep rocks in place, and report unusual sightings through local wildlife channels when requested.