The American Giant Salamander is the largest amphibians in the world, bigger than the Japanese giant salamander and the Chinese giant salamander. It resembles a cross between a Japanese giant salamander and a long-extinct koolasuchus, but is darker in color and is bigger, between 7 and 10 feet long. They live in southern USA areas, including Florida. It is known to hunt young Florida alligators, but more often, it feeds on small fish, smaller amphibians, small reptiles, and small mammals (including rats, mice, etc., and sometimes pets).