1​. The world is home to more than 450 kinds of sharks.
2​. Most fish have two gills, but sharks have as many as seven gills.
3​. Sharks have lived on earth for more than 400 million years.
4​. A great white shark can have as many as 300 teeth in its mouth.
5​. A shark has a good sense of smell. It can smell a small drop of blood in a very large swimming pool.
6​. Elephants and bees kill more people each year than sharks do in conclusion