Sharks have been around for about 1 million years. Some species of sharks are believed to have been here before dinosaurs. There are about 316 different kinds of species of sharks. Over 70-75 million sharks in the ocean are caught every year. Sharks are rated at having the same mentality as pigeons and white rats. Sharks have to keep swimming if they want air to breathe. If they stop swimming, they can sink to the bottom and drown. Sharks are known as Mano in Hawaiian.

Sharks can produce about 2 - 135 eggs at a time. It depends on the species of the shark. Some species can produce more than 135 eggs. A regular shark takes about 5 months to hatch but the Atlantic dogfish takes about 2 years to hatch. Baby sharks always eat the same things as their mothers.

Sharks have no bones; they are made of cartilages. Sharks mostly like to eat squid and crabs.

All sharks are predators. About 80% of sharks do not hurt humans. All together, sharks only kill about 10-15 people a year. The main reason why people get killed by sharks is because people provoke them and some of the people get too close to them. There are only 4 kinds of sharks that are considered very dangerous to humans: the great white shark, tiger shark (they are as long as 18 feet and can weigh up to 2000 pounds), the bull shark, and the blacktip reef shark. Some of the sharks that are known to attack people are the bull shark, oceanic whitetip shark, blue shark, and the mako shark. Skates, rays, and raffish are very similar to sharks but in different ways. They are not part of the same family.

The oldest shark that ever lived was a squash and they can live up to 70 to 100 years, just like humans. The jet-black shark is the easiest one to spot because it has a black strip on its back. They are 6 feet long. You can also see the blacktip sharks in the reefs. They only live in the reefs and they stay far away from human beings.

Sharks are very similar to jacks. They are the same but their fins are shaped differently. Some fishermen capture sharks because of their fins. Jacks have bones that are made out of mineralized bones similar to human beings.

The basking shark is the second largest shark in the world. The basking shark can only be spotted well in the UK and New Zealand. There is a basking shark watch project because those kinds of sharks are rarely spotted.