Great White Sharks
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Great White sharks are a large species of shark, as their name suggests, growing from 16 to 36 feet in length and weigh up to 4,000 pounds (BoatTalk). They belong to the Lamnidae family of vertebrates, of the Carchardon genus, species carcharias (Indian). They are streamlined swimmers with a torpedo-shaped body and a pointed snout. They have roughly 3,000 teeth arranged in several rows. The first two rows of teeth are used for grabbing and cutting prey, while the last row of teeth rotate into place when front teeth are broken, worn down, or fall out. The teeth are triangular shaped with serrated edges. The back of the shark is dark grey in color, and the underside is white. The Great White has three main fins: the dorsal fin (on its back), and two pectoral fins (on the sides). The tail is crescent shaped. The Great White can swim as fast as 25 mph. The Great White is a voracious and efficient predator, feeding on a wide variety of bony fishes such as salmon, hake, halibut, mackerel, and tuna, other sharks, whales, dolphins, sea turtles, sea birds, and marine mammals such as seals, sea lions, and sea otters (BoatTalk; Dale). The Great White is the world's largest ocean predator and will even eat dead animals it finds floating on the surface. It can even leap out of the water to catch its prey from below or behind. When searching for prey, the shark will swim along the sea bottom looking for shapes on the surface. If it sees something similar in shape to a sea
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n period is uncertain, but is believed to be about one year (WWF).
Sharks have very highly developed senses (Dale). Their primary sense is that of smell, and their nostrils can smell a drop of blood in 25 gallons of water. Their next most important sense is detecting electrical charges. They can pick up electrical charges as small as 0.005 microvolts. They can detect their prey by the electrical field generated by a beating heart or the action of gills. They can detect fish in hiding this way.
It was once believed that Great White sharks spent most of their lives close to shore, hunting seals and sea lions, but a new study has shown that they migrate over large distances (Shwarz). One male shark tagged off the Central California coastline migrated to the waters of Hawaii and stayed there for almost four months. Researchers attached satellite archival tags to the backs of six adult Great White sharks near seal rookeries in California between 1999 and 2000. The tags recorded data every two minutes on water depth, temperature, and light. Up to this time, scientists believed that the sharks were coastal animals that bred in the waters of Southern California, then migrated a few hundred miles north to the seal colonies t
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Approximate Word count = 1377
Approximate Pages = 6 (250 words per page)
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