Sharks skin is normally thick, dull gray in color, and roughened by toothlike scales. A muscular, asymmetrical, upturned tail, pointed fins, and a pointed snout extending forward and above a crescentic mouth equipped with sharp triangular teeth are all common features. Sharks do not have a swim bladder and must swim constantly to avoid sinking.

Sharks play a vital role in the ecosystem as apex predators, maintaining the food chain below them and functioning as an indicator of ocean health. They assist in the removal of the weak and diseased, as well as maintaining the balance with rivals, ensuring species variety.

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