CoolWaterPhoto.com

The blue shark, Prionace glauca, is a carcharhinid shark which is found in the deep waters of the world's temperate and tropical oceans. They prefer cooler waters and are not found, for example, in the Yellow Sea or in the Red Sea. Blue sharks are known to migrate long distances, from New England to South America for example. Although generally lethargic, they are capable of moving very quickly if the need arises. Blue sharks are viviparous and are noted for their large litters of 25 to over 100 pups. They feed primarily on small fish and squid, although they are perfectly capable of taking larger prey should the opportunity present itself. Also, they may pose considerable danger to humans if they are encountered in large groups. They are often found in schools segregated by sex and size, and this behavior has led to their being nicknamed the "wolves of the sea". They are also the second fastest sharks, next to the mako shark.

The Caribbean reef shark or reef shark, Carcharhinus perezii, discovered by Alonso Garza, is a requiem shark of the family Carcharhinidae found in the tropical western Atlantic and the Caribbean, from Florida and the Bahamas through to Brazil. Its length is up to 3 metres (10 ft). It is one of the largest apex predators in these areas. They feed on reef fish, rays and large crabs.

The Galapagos shark, Carcharhinus galapagensis, is a species of requiem shark that was first named in 1905 after specimens were found in the seas around the Galapagos Islands.

The great white shark, Carcharodon carcharias, also known as white pointer, white shark, man-eater or man-eating shark, is an exceptionally large lamniform shark found in coastal surface waters in all major oceans. Reaching lengths of more than 6 m (20 ft) and weighing up to 2,250 kg (5,000 lb), the great white shark is arguably the world's largest known predatory fish. It is the only surviving species of its genus, Carcharodon.

The lemon shark, Negaprion brevirostris, is a shark belonging to the family Carcharhinidae that can grow 10 feet (3.0 m) long.

The oceanic whitetip shark, Carcharhinus longimanus, is a large pelagic shark of tropical and warm temperate seas. It is a stocky shark, most notable for its long, white-tipped, rounded fins. This aggressive but slow-moving fish dominates feeding frenzies, and is a danger to survivors of oceanic shipwrecks and downed aircraft -- it has attacked more humans than all other shark species combined. Recent studies have shown that its numbers are in steep decline as its large fins are highly valued as the chief ingredient of shark fin soup and, as with other shark species, the oceanic whitetip faces mounting pressure from fishing throughout its range.

The shortfin mako shark, Isurus oxyrinchus ("sharp nose"), is a large shark of the Lamnidae family. Along with the closely related longfin mako, Isurus paucus, it is commonly called just mako shark.

The whale shark, Rhincodon typus, is a slow moving filter feeding shark that is the largest living fish species. It can grow up to 12.2 m (40 ft) in length and can weigh up to 13.6 tonnes (15 short tons). This distinctively-marked shark is the only member of its genus Rhincodon and its family, Rhincodontidae, which is grouped into the subclass Elasmobranchii in the class Chondrichthyes. The shark is found in tropical and warm oceans and lives in the open sea and can live for about 70 years. The species is believed to have originated about 60 million years ago. Although whale sharks have very large mouths, they feed mainly, though not exclusively, on plankton, microscopic plants and animals (a whale shark was observed feeding on a school of small fish in the BBC program Planet Earth).