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Live about 20-30 years, however some live up to 90 years.

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Sharks use their gils to extract dissolved oxygen from the water through a system of capillaries. Sharks have 5-7 gils located on the sides of their heads.

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The shark's heart has two chambers, an atrium and a ventricle. Swimming helps circulate blood throughout the shark's body.

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The skeleton of a shark is made of cartilage. There are no hard bones in a shark.

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Sharks can feel electricity
A sense that humans don't have
They use this to hunt at night

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The blue shark can give birth to 135 pups in one litter.

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Why aquariums don't have great white sharks

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Why aquariums don't have great white sharks

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Aquariums do not have great white sharks. Because of the nature of great whites they do not work in a closed environment.

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Many have tried to keep a white shark in captivity. Here's why that's so difficult. There are several aquariums around the world, including one in Georgia, that house whale sharks, the biggest fish in the sea. But not one has a great white shark on display.

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Bull sharks can live in fresh water.

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Shark embryos eat each other in the womb.

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Hammer head sharks use their head for a super electronic sensor.

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Whale sharks are the biggest sharks, and the biggest fish.

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Use a pair of claspers that attach and fertilize the female. Sharks are usually born live.

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The digestive system starts with the esophagus and it leads to the gut and spinal valve. After the spiral valve, waste leads to the cloaca, the opening for urinary, digestive and reproductive purposes.

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Sharks have two types of muscles, red muscles and white muscles. Red muscles require lots of oxygen, and they are used for cruising. White muscles do not require lots of oxygen and are used for sudden and fast movements.

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Sharks, an old species
Survived for millions of years
Will not go away soon

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The largest great white shark ever filmed.

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Top Great White Shark Videos | Discovery

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Large and complex brains, brain size to body size ratio is large.

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The film Jaws scared the general public from sharks and the ocean. It made people much more aware of sharks.

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Jaws was a film of firsts. It was the first film with radio microphones, the first to be shot on the ocean and the mechanical shark was an extremely ambitious project.

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Has the five main senses and can sense electric currents.

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Common Name: Goblin Shark
Scientific Name: Mitsukurina owstoni

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Two lobes that store oils and fatty acids and aid buoyancy. 5-25% of it's body weight.