Shark
Pictures

One major factor in how mako sharks are able to move so fast is the unique structure of their skin, especially around the flank and fin regions of their bodies.

The Helicoprion has a whirl of teeth in its lower jaw.

Northern river sharks live in freshwater along Northern Australia and Papua New Guinea

The Xenacanthus is a prehistoric genus of sharks that went extinct at the end of the Triassic period, about 202 million years ago.

Sharks that went extinct - Orthacanthus.

Oceanic whitetips are believe to have killed more people than great white sharks

Most fish do not have eyelids. Sharks are an exception to this.

A Lemon Shark lying on the sand in the Bahamas. Lemon sharks are named for their yellow-brown skin that helps them camouflage in the sandy, tropical waters they inhabit.

The world's largest predatory fish, great white sharks commonly weigh a few thousand pounds.

The lantern shark, which is only found in the deep sea, is one of quite a few species of sharks that emit light.

A Great white shark, Carcharodon carcharias, jumping out of the water. Great whites are the world's largest predatory fish.

By sending in a robot to document, scientists discovered that Pacific sleeper sharks have taken up residency in a volcano.

Adapting to the lack of reproduction opportunities in captivity, some sharks have been found to reproduce asexually.

Though it can be found in many areas around the world, the spined pygmy shark rarely approaches the surface of the water.

Found on the coastal surface waters of all major oceans, the great white shark has no known natural predators. While humans are not its preferred prey, the great white shark is responsible for the largest number of unprovoked shark attacks on humans.

close-up of Sixgill Shark

The mako shark is considered dangerous to humans because of its speed — it can attack aggressively and quickly. It has even been known to "jump" into fishing boats!

Are Sharks Mammals

Biggest Shark

Megamouth shark, Megachasma pelagios, at Toba Aquarium, Japan

Greenland sharks aren't adults until they're around 150 years old, and they keep growing their whole lives at a rate of one centimeter a year.

Underwater view of a great white shark during a cage diving trip at Guadalupe Island, Mexico. Although it is not the largest of all sharks, the great white is the largest predatory shark.

This shark's unusual name comes from the unusual shape of its head, an amazing piece of anatomy built to maximize the fish's ability to find its favorite meal: stingrays.

A pelagic thresher shark, Alopias pelagicus, swims by a coral reef in the Philippines.

Silhouettes of people in aquarium looking at a big shark through the glass. Sharks have special electroreceptor organs that allow the shark to sense electromagnetic fields and temperature shifts in the ocean.

A huge Mako Shark swimming underwater offshore. The Mako Shark is not only the fastest shark in the water but one of the fastest creatures on earth

The most notable feature of the thresher shark is the long, whip-like upper lobe of their tail, which is known as the caudal fin.

Basking shark (Cetorhinus maximus)

Basking Shark with mouth open

Head of a Basking Shark (Cetorhinus maximus) in the deep

Basking shark (Cetorhinus maximus) off the Isle of Coll, Scotland

Adult bull (Carcharhinus leucas) at Shark Reef Marine Preserve, Beqa Lagoon, Fiji

Bull Shark

Bull shark (Carcharhinus leucas)

Great White Shark

A Great White Shark showing it's teeth.

Great White Shark

Great White Shark

A Great White Shark.

A Great White Shark swimming off the coast of Mexico.

Grey Reef Shark

Grey Reef Shark

Grey Reef Shark

Grey Reef Shark

Hammerhead Shark from above

Hammerhead Shark swimming over sand

A school of Hammerhead Sharks

Hammerhead Shark swimming with other fish

Hammerhead Shark swimming with other fish

Horn Shark

A horn shark on the ocean floor