All sharks swim very fast, but the blue shark is one of the fastest species. Blue Sharks often look hungry due to the thin body they have. However, they are slender by nature and it has nothing to do with the amount of food they eat.
http://www.sharks-world.com/types_of_sharks/
Bonnethead Shark. Bonnethead sharks (Sphyrna tiburo) are about the same size as scoophead sharks-they can reach a maximum length of about 5 feet. They have a narrow, shovel-shaped head. Bonnethead sharks are found in tropical wasters in the eastern Pacific and western Atlantic Oceans.
http://marinelife.about.com/od/Shark-Species-Profiles/tp/Hammerhead-Sharks.htm
Many hammerhead sharks live in warm waters fairly close to shore, although most of them are not considered of much danger to humans. Here you can learn about the 10 species of hammerhead sharks, which range in size from about 3 feet to 20 feet in length.
http://marinelife.about.com/od/Shark-Species-Profiles/tp/Hammerhead-Sharks.htm
Sharks are found in all seas and are common to depths of 2,000 metres (6,600 ft). They generally do not live in freshwater although there are a few known exceptions, such as the bull shark and the river shark, which can survive and be found in both seawater and freshwater.
https://en.wikipedia.org/wiki/Shark
They range in size from the small dwarf lanternshark (Etmopterus perryi), a deep sea species of only 17 centimetres (6.7 in) in length, to the whale shark (Rhincodon typus), the largest fish in the world, which reaches approximately 12 metres (39 ft) in length.
https://en.wikipedia.org/wiki/Shark
1. Great Hammerhead. As you might guess by its name, the great hammerhead (Sphyrna mokarran) is the largest of the hammerhead sharks. They can reach a maximum length of about 20 feet, although they are about 12 feet long on average.
http://marinelife.about.com/od/Shark-Species-Profiles/tp/Hammerhead-Sharks.htm
It has been known to attack people, which makes it one of species of shark that people most fear. Blue sharks can grow up to 12 feet long so this is no small shark to be trying to get away from. Due to the speed and the strength of it very few of its prey have a chance of survival.
http://www.sharks-world.com/types_of_sharks/
This information will help you identify some of the common species of sharks. There are 440 different species of sharks in the world today classified into eight different orders described below with some examples of known sharks species for each group.
http://www.sharks-world.com/types_of_sharks/
Like most extinct sharks, C. megalodon is also primarily known from its fossil teeth and vertebrae. This giant shark reached a total length (TL) of more than 16 metres (52 ft). C. megalodon may have approached a maxima of 20.3 metres (67 ft) in total length and 103 metric tons (114 short tons) in mass.
https://en.wikipedia.org/wiki/Shark
There are many species of sharks found in the oceans around the world. Some of them are very big while others are quite small. Some of them are to be feared while others mind their own business and they are very calm.
http://www.sharks-world.com/types_of_sharks/
how many species of sharks are there
There are 440 species of sharks.