Title.

Dolphins, porpoises, and whales belong to a group of mammals called cetaceans. Dolphins and porpoises closely resemble each other, and people often confuse the two groups. Their chief differences occur in the snout and teeth. Dolphins have a beaklike snout and cone-shaped teeth. Porpoises have a rounded snout and flat or spade-shaped teeth. Whales grow much larger than most dolphins and porpoises.

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