Most dolphins die from foreign object being thrown into the ocean. Not all dolphins swim way out in the ocean. Some dolphins, such as the Commerson dolphin swim in the shallow coastal areas in the water. Calfs can be 90-130 centemeters long and will grow to about 4 meters long in 40 living years. They are used for grabbing food, but not chewing since dolphins swallow their pray.
Dolphins can hold their breath for five to eight minutes.
Some dolphins tend to live for about twenty years, others, but not all live until they are forty. A dolphin is actually a large whale but with a pointed noise. Dolphins make noises called echolocation , and vocalization from out of thier blowhole. When calfs are only 3 days old it still swims and breathes just like its mother.