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Created with Fabric.js 1.4.5 EVOLUTION OF SHARKS 5% Other Sharks, Skates and Rays Shark Evolution SOURCES: 1. An ancient relative of the great white shark,2. 4. TEETH fins are chopped off andthe shark is droppedback in the ocean aliveleft to die Whale Sharks Leopard Sharks Megladon Sharks have rows of teeth that constantly replace each otherThere are different kinds of shark teeth for different feeding habitsThe teeth are adapted for the diet various species of sharks have developed. double click to change this header text! Threats to Evolution of Sharks? Sharks have existed for over 400 million years. Sharks predate the dinosaursAs sharks are cartellagenouss, fossil evidenceof early sharks is from fossilized teeth and a few skin impressions. Cladodonts, primitive sharks, had double-pointed teeth, were up to 6 feet (2 m) long, ate fish and crustaceans, and lived about 360 million years ago (mya). Finning - shark fin soup...Sharks mature slowly, and reach reproductive age anywhere from 12 to 15 years. This, combined with the fact that many species only give birth to one or two pups at a time, means that sharks have great difficulty recovering after their populations have declined CountershadingFusiform ShapeAmpullae of LorenziniLateral LineGillsDermal DenticlesHeat Exchangers There are now over 400 species of sharks! How Teeth Effect Diet Canopener teeth for prying openKnife teeth with serrated edges for slicing throughFork (pointed) teeth for grabbing An ancient relative of the great white sharkLarger than Whale sharks Speciation 5. An ancient relative of the great white shark,6. 8. Adaptations 9. An ancient relative of the great white shark,10. 12. Range Sharks have adapted to living in a wide range of aquatic habitats at various temperatures. While some species inhabit shallow, coastal regions, others live in deep waters, on the ocean floor and in the open ocean. Some species, like the bull shark, are even known to swim in salt, fresh and brackish waters.
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