Dolphins are mammals. They are usually smaller than whales. Many dolphins have light-colored bellies and dark-colored backs. This offers them some protection from predators. Dolphins are powerful swimmers that are found in all of the oceans. Dolphins can be recognized from porpoises because they have well-defined beaklike snouts, with 200 and 250 sharp teeth teeth shaped like cones. They breathe through a blowhole. They eat an enormous amount of food that is nearly equal to one third of the weight.
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