Overfishing

Lifestyle

How Many Species of Sharks Are There?

The Diversity of Sharks Sharks are a diverse group of cartilaginous fish that have been around for over 400 million years. There are currently over 500 known species of sharks, ranging in size from the tiny pygmy shark, which is only about 8 inches long, to the massive whale shark, which can reach lengths of over 40 feet. Sharks come…