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Dolphins are considered to be amongst the most intelligent of animals. The are friendly and extremely playful. They are also easy to train. These qualities have made them a favorite of many people.
Scientists believe that dolphins conserve energy by swimming alongside ships, a practice known as bow-riding.
Dolphin vary in color, but they are generally gray with darker backs than the rest of their bodies.
Most dolphin species have a long lifespan. It is estimated that some may have lived for more than 100 years.
Dolphins mate throughout the year.
Gestation lasts from 9 to 17 months depending on the species. They usually have only one baby. When it is time to give birth, the female will distance herself from the pod, often going near the surface of the water.
As soon as the calf is born, the mother must quickly take it to the surface so it can take its first breath. The calf will nurse from 11 months to 2 years, and after it is done nursing it will still stay with its mother until it is between 3 and 8 years old.
Dolphins are at risk because the oceans are being polluted. They are also losing their habitats and many countries still allow dolphins to be hunted. Fishing nets also pose a problem for the dolphin population as does the increase in boating traffic.