Sharks are a type of fish.
Sharks are amazing fish that have been around since long before the dinosaurs existed.
They live in waters all over the world, in every ocean, and even in some rivers and lakes. Eggs usually fertilized in the water. SIZE A scuba diver above a Whale shark. There are many different species of sharks that range in size from the size of a person's hand to bigger than a bus. Most sharks have streamlined, torpedo-shaped bodies that glide easily through the water.