Sharks are a kind of fish.
They live in oceans all over the world.
Most sharks like warm water, but some can live in cold seas.
Sharks do not have bones.
Their skeletons are made of cartilage, the same soft thing in our ears and noses.
They have many sharp teeth.
When one tooth falls out, a new one grows in its place quickly.
Sharks cannot blink their eyes like we do.
They must keep swimming to breathe.
Some people think all sharks are dangerous to humans.
That is not true.
Most sharks are shy.
They do not look for people to bite.
Sharks are important for the ocean.
They help keep other sea animals in balance.
We need to protect them and their home in the sea.
