Crocodiles have powerful jaws with many conical teeth and short legs with clawed webbed toes. They share a unique body form that allows the eyes, ears, and nostrils to be above the water surface while most of the animal is hidden below. The tail is long and massive, and the skin is thick and plated.

What are some characteristics of crocodilians?

Large, solidly built, lizard-like reptiles, crocodilians have long flattened snouts, laterally compressed tails, and eyes, ears, and nostrils at the top of the head. They swim well and can move on land in a "high walk" and a "low walk", while smaller species are even capable of galloping.

What is special about a crocodile heart?

Crocodilians have a unique heart that shares anatomical features with reptiles, birds and mammals. The crocodilian heart has four chambers with two atria and two ventricles, the same as birds and mammals. ... The result is that less oxygen is carried to the body through arterial circulation.