Like the famous cartoon characters, the Ninja Turtles, the turtle is an impressive versatile animal with lots of tricks up its sleeve. They are cute, lovable and extremely hardy. Watch how the young turtle hatchlings freeze and unfreeze. Truly amazing. The turtle is a reptile. The largest breed of turtle is the leatherback sea turtle (Dermochelys coriacea). It grows to a length of almost 7 feet (measured at its shell) and weights almost a ton.