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Evolution And Classification, Overview Of Shark Groups, Structural And Functional Adaptations, Locomotion And Buoyancy

The sharks are a group of about 350 related species of cartilaginous fish, members of which are found in every ocean in the world. Far from their reputation as primitive monsters, the sharks are, in fact, some of the most fascinating, well-adapted marine organisms. Their many structural and functional adaptations, such as their advanced reproductive systems and complex sensory abilities, combine to make them very well suited to their environment.

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Science EncyclopediaScience & Philosophy: Semiotics to Smelting