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6. Bottom-Feeding Sharks

Most sharks able to use buccal pumping are bottom-feeders. They frequently rest on the ocean floor and have a dorsoventrally flattened body. Their bodies are flat and thin along their backs. Buccal breathing sharks have prominent spiracles behind the eyes. The spiracles pull water in and push it back out when the shark is buried in the sand on the ocean floor.

bottom feeder, ocean floor, sand Martin Voeller / Getty Images

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