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open-mouthed or gulping, and filter prey from the water using their baleens. A baleen is a row of several keratin plates attached to the upper jaw, with a composition similar to those in human hair or fingernails. These plates are triangular in section with the largest, inward-facing side bearing fine hairs forming a filtering mat. Right whales are slow swimmers with large heads and mouths. Their baleen plates are narrow and very long--up to in bowheads--and

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