Fins
Fins are appendages used by marine animals to propel themselves through water. They come in various shapes and sizes and are made of different materials depending on the animal. Fins can be used for different purposes such as stability, maneuverability, and speed. Some animals have specialized fins such as the dorsal fin of sharks which is used for stability and the pectoral fins of whales which are used for steering. Fins are also used by humans in various water activities such as swimming, diving, and surfing. They can be attached to the feet or hands and are made of materials such as rubber, plastic, or carbon fiber.
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