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There are 78 species of dolphins in the world. The smallest dolphin is called the Heaviside dolphin(Cephalorhynchus heavisidii). It grows approximately 1.2m long and weighs about 40kg.
Dolphins are found all over the world. They are mammals, which means they give birth to live young. Dolphins can swim very fast through the water. They can swim faster than a ship going 25 knots. The family scientific name for the dolphins is; Delphinidae. Dolphins have an elongation of their top and bottom jaw. This is called a beak. Dolphins eat fish and other sea creatures, but the dolphin is a nice dinner for the shark.
Dolphins have a large brain, but seem to be no more intelligent than any other mammal. There are two dolphins that are endangered; the Chinese river dolphin (Lipotes vexillifer), and the Indus dolphin (platanista minor).
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