Dolphins have many parts, but the ones on this picture are the most common. The median notch is the middle part of the dolphin's tail. It provides strength, speed and flexibility for the dolphin while swimming. The flukes provide speed as well. The dorsal fin on the top of the dolphin is used for balance when gliding in the water. The ear is hardly noticed, but hearing is a dolphin's best sense. Their eye sight isnt as good as their hearing, they mostly see a blur in water. A dolphin's blowhole is used for breathing. They don't really use it for smelling. The blowhole closes up when underwater, but when a dolphin reaches the surface, it opens up. Dolphins are not fish, so it has to breathe air just like humans.
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