Did you know that there ar more than 350 species of cheat? approximately of the most common types of sharks ar the angel sharks, saw sharks, and alarm sharks. Sharks have a strange fossil record populateing of mainly dentition. The shark is too considered to be the perfect predator. Sharks come in all different shapes and sizes. Sharks are in any case known to approximatelytimes try people. Some of the main types of sharks are the angel sharks, saw sharks, and apprehension sharks. Squainiformes, or also known as the angel sharks, are characterized by their ray like flattened bodies. This order has booster and only(a) family that is called Squatindae that contains about 13 species. The maximum size that can be reached by any integrity of these species is 4-6 feet in length. Pristiophoriformes are also known as the saw sharks. This order has only has one family, Phistophoriformes, which contains five species. These sharks are easy to recognize because they have an lengthy blade like snout that is lined with sharp teeth along the edges, which gives them the name saw sharks. Hexanchiformes, or cow sharks, live of two families. They are recognized by their six or seven pairs of gill slits. These sharks can often be illustrate in deep water. Shark fossil records are neither at best. Most fossils found so far consist of postal code still teeth; in more or less cases a a few(prenominal) vertebrae have been found. This is rare because sharks do not have mug up; instead, they have cartilage which, reversion to common belief, is rather solid. In the rarest of cases complete fossils have been discovered. at that place were not too more changes in the shark fossils in millions of years. The Hybodonts, who made their appearance some 320 million years agone in the age of the dinosaurs, were quite a common throughout... this was definately a very inf ormative essay but it would have been refor! m to have been organized by shark type. a alter place to find information on sharks is at your local anaesthetic aquariums website If you want to get a ample essay, order it on our website: OrderCustomPaper.com
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