Dolphins

A detailed Summary of Dolphins

The mammalian dolphins are small, streamlined whales, usually with

a well-defined, beaklike snout. They are often called porpoises, but

that name is usually reserved for similar, but beakless, whales of the

family Phocoenidae (see porpoise). Dolphins are popularly noted for

grace, intelligence, playfulness, and friendliness to man. The most

widely recognized species are the common and bottle-nosed

dolphins (Delphinus delphis and Tursiops truncatus; see photograph);

both are of the family Delphinidae and are widely distributed in warm

and temperate seas. These are probably the species of dolphins mentioned in the

works of Aristotle, Aesop, Herodotus, the Plinys, and other early writers, often as a

child's mount or the rescuer of someone lost in the sea.

dorado, is a popular food and sport fish. Famed for the rapid changes undergone by its

are found in tropical rivers and oceans and are sometimes included in the family

The Platanistidae, or river dolphins, comprise four genera and species of small, mainly

sounds and ultrasonic pulses. It adapts to captivity better than the common dolphin,

size, are not usually thought of as dolphins.

reduced eyes, and poor vision. The Stenidae, or long-snouted dolphins, comprise three

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Category: Science

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