The alligator snapping turtle is one of the largest freshwater turtles in the world found in southern US states like Florida and Mississippi. While young turtles are carnivorous, adults are scavengers. The largest recorded alligator snapping turtle weighed 403 pounds. Females lay between 10-50 eggs at a time. Alligator snapping turtles have a large head and thick shell with ridges, and can grow up to 175 pounds.