The Hellbender is a giant salamander from North America, where he inhabits fast flowing streams. The swiftly flowing water is essential for oxygenation. Although he retains gill slits and has lungs, he also obtains oxygen through capillaries in his side frills. He is solitary in nature, and relative sedantary. His main diet consists of small fish and crustaceans and his flattened shape allows him to crawl beneath rocks and protect himself from predators.