Crocodiles are brownish-green, have a long, narrow skull, and pointed snout, and a streamlined body. The tail is used like a paddle and is very powerful. Even when its mouth is closed, all its teeth are visibvle. Their teeth last two years and are all replaceable. Crocodiles can grow to be 20 feet long and can weigh up to 2,000 pounds.
Crocodiles eat mostly fish, but have been known to catch and eat anything that wanders near enough.
They swallow their prey whole, usually after drowning it, and they never chew. They have a tongue, but it doesn't help in their digestion. Crocodiles eat rocks which stay inside the stomach and help to grind up their food. Some scientists say that this helps keep the crocodiles from feeling hungry, or serves as extra weight while swimming or diving, to stay stable in the water. The American crocodile has an interesting way of attracting fish to them.