Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The ground sharks, order Carcharhiniformes, are the largest order of sharks; they are also called whaler sharks. With over 270 species, carcharhiniforms include a number of common types, such as the blue shark, catsharks, swellsharks, and sandbar shark. Members of the orders are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits.

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