Crocodilians' teeth are mostly identical, thick-walled cones embedded in the outside of the jaw. Rear teeth are more cylindrical and blunter than front teeth. The teeth are not cemented into the jaw but simply attached to the outside, and can be broken off. Crocodilians do not have lips and their mouths leak when closed. Their stomachs are the most acidic recorded for any vertibrate, allowing them to digest even the bones and shells of prey animals.
All crocodilians have strong jaw muscles for biting and holding prey.
They are all entirely carnivorous. Crocodilians need not feed often. A study on Nile crocodiles indicated that they usually eat only about 50 full meals a year. Snakes, molluscs, turtles and bats may also be eaten. Flying prey can be caught by the crocodilians leaping into the air with thrusts of their powerful tail.