Sharks

Sharks

Introduction Sharks have lived in the oceans since before dinosaurs walked on Earth. There are more than 350 kinds of sharks, and they can be found all over the world.

Sharks are fish, but their skeletons are made of cartilage instead of bones. Cartilage is what gives human ears their shape. Unlike most fish, sharks have rough skin.

Sharks have a very good sense of smell. They also see well in poor light. Sharks can sense when hurt animals are moving in the water.

Description Sharks come in many sizes. Some sharks are only a few inches long. The whale shark is the largest fish in the world. Sharks have pointed noses and long, thin bodies that let them swim very fast.

Many sharks are dark on the top and light on the bottom. This color pattern makes it harder for other animals to see them.