Any of several large freshwater turtles of the family Chelydridae of North, Central, and northern South America, having a rough shell and powerful hooked jaws that close with a snap, especially the common North American species Chelydra serpentina and the alligator snapping turtle of the south-central United States. Either of two species (family Chelydridae) of edible, omnivorous, freshwater turtles found in North and Central America. They are tan to black and have a rough upper shell, a small cross-shaped lower shell, a long tail, and a large head with hooked jaws. Known for their fierceness, they lunge at aggressors and prey and bite them with their powerful jaws. The common snapping turtle (Chelydra serpentina) has a shell 8-12 in. (20-30 cm) long and weighs 10-35 lbs (4.5-16 kg). The alligator snapping turtle (Macroclemys temmincki), the largest freshwater turtle in the U.S., has a shell 16-28 in. (40-70 cm) long and weighs 40-155 lbs (18-70 kg). It lies quietly on the bottom of slow moving bodies of water, luring fishes by means of a wormlike appendage on the floor of its open mouth
A large freshwater snapping turtle (Macroclemys temminckii) of the south-central United States, having a rough carapace and powerful hooked jaws. Also called alligator snapper