Informative article about shark behavior.

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English CAS, Period 7

Informative article about shark behavior.

Are sharks really killers from the deep?  A recent study shows that sharks are nothing more than big fish, some with large teeth, and a sly grin.  These predatory animals may look frightening to humans, but they try to avoid us.  Sharks are without a doubt carnivorous and predatory, but they rarely attack humans. Worldwide there are less than a hundred shark attacks on humans (as reported by the International Shark Attack File).  Studies show that dogs kill more people each year than Great White Sharks have killed in the last hundred years. Sharks are just misunderstood animals. Humans are in most cases just too big for them to eat.  Sharks have a wide range of foods that they consume. Sharks feed on food ranging from small little zooplankton to squids, octopuses, and seals.  Unlike other fish, sharks do not have bones.  Their skeleton is made up of cartilage, which is not as hard as bone.  Sharks also do not have a swim bladder, which controls the buoyancy of other fish.  Because sharks have no swim bladder, they must constantly move around in order to stay afloat.  

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Most sharks have up to eight fins on their bodies. Most fins have a definite use while others are just an mystery. The dorsal fin is one of the most important fins that a shark may have. This fin is on the back of the shark and is often seen "slicing" through the water in many Hollywood films. This may frighten many beachgoers but the fin is just used a stabilizer. It keeps the shark from rolling onto its side when swimming.  The dorsal fin is also a distinctive feature that helps us recognize that there is a shark swimming ...

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