Скачать или смотреть Porpoise | There are seven species of porpoise and they are often mistaken for dolphins.

These mammals live in rivers, estuaries, and bays in many areas of the world. A porpoise can dive more than 600 feet into the depths of the ocean. Porpoises communicate with one another in a series of whistles and clicks.
Porpoises can live to be 23 years old, dependent on its health and potential predators in its area.
• While social, these mammals can usually be seen traveling in pairs or groups (shoals) of three. However, harbor porpoises are known to travel in a shoal of up to 100!
They are carnivores that eat mostly fish and crustaceans. It swallows its prey whole and often alerts other porpoises once it finds a food source.
• Porpoises are related to both dolphins and whales. To tell the difference between a porpoise and dolphin, look at the animal’s nose. A dolphin has a beak-like nose while a porpoise has a more rounded head and shorter nose.
Porpoises vary in color but all have smooth, sleek skin and their backs are darker in color than their stomachs (known as countershading). Most porpoises are a shade of gray on their back and a lighter gray or white on their stomach, however, the Burmeister’s porpoise is mostly dark gray or black in color and the Dall’s porpoise has a black and white coloring.
Porpoises have strong flippers and teeth with spade-shaped tips – their dentition is actually a way they differ from dolphins. A porpoise has a rounded head and a triangular-shaped dorsal fin. However, as their name suggests, the finless species of porpoise do not have fins.