Most of what you see is normal activity, merely accentuated for the purpose of the display. There is much to learn about the biology of these complex creatures. Fifty million years ago, the ancestors of dolphins were land-dwellers, but dolphins have become so completely adapted to aquatic life that if stranded on a beach they will die. Their hydrodynamically streamlined bodies, powered by the up and the down of the tail flukes, enable them to achieve speeds of up to 30 km per hour. A blowhole, located in the top of the head, facilitates inhalation of air when the dolphin breaks the surface of the water.
Dolphins have keen eyesight, acute hearing and a well developed taste sense.
It also has a unique sense, known as echo-location, the dolphin emits sounds by the means of a sonar system, which bounce off underwater objects, and receives and analyzes the returning echoes.