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Every Shark is different. The average shark lives 20-30 years. The Dogfish and the Whale Shark have been known for living over a century.

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Male sharks have claspers that are attached to the pelvic fin and are used to fertilize the females internally. Female sharks produce sharks by either oviparous, ovoviviparous or viviparous.

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Sharks electrical sense perception is in the ampullae of Lorenzini,. They are small tubes that are extremely sensitive to electrical signals in the water.

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Sharks like stingrays, have very complex brains. The cerebellum is responsible for movement. Most sensory information is processed in the hindbrain.

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Sharks liver is made of two large lobes that concentrate and store oil acids.

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Sharks use their gills to extract dissolved oxygen from water through a system of capillaries. Sharks have up to 5,6, or 7 pairs of gill slits located on the side of their heads.

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A sharks heart is a two chambered tube with an atrium and ventricle . It is small impression to the sharks body causing them to have low blood pressure.

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The sharks esophagus is short and wide and the stomach is a U shaped that leads the food to the gut. The spiral valve is the lower part of the digestive system.

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A sharks red muscle is slow and supplies oxygen.

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The skeleton is made from cartilage.

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Sharks

Shark swims purposely
It can smell blood miles away
Waiting for dinner

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Great White

Jet eyes watch surface
wait for passing mammal pray
speed, splash, fight, snap, blood

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Whale sharks are the largest sharks in the ocean. They can grow to be 65 feet long and weigh over 10 tons.

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Hammerhead sharks are adapted to shallow waters. While hunting, hammerheads reduce vertical space to give pray less room to escape.

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Many sharks have a sensory organ that run the length of the sharks body. It is full of nerves that detect sudden vibration and pressure changes in the water.

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Scientific Name: Mitsukurina owstoni

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A typical shark will grow and lose thousands of teeth over the course of their life.

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Sharks have pores on their snout that help them detect other animals

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Great White sharks prefer colder waters with rocky bottoms.

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Sharks have been in the oceans for over 400 million years

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The whale shark is the longest shark that ranges to 18 meters