Dolphin
Most dolphins are small, measuring less than 3 metres (10 feet) in
length, and have spindle-shaped bodies, beaklike snouts (rostrums), and
simple needlelike teeth. Some of these cetaceans are occasionally called porpoises,
but scientists prefer to use this term as the common name for the six
species in the family Phocoenidae, all of which differ from dolphins in
having blunt snouts and spadelike teeth.The bottlenose, characterized by a “built-in smile” formed by the
curvature of its mouth, has become a familiar performer in oceanariums.
It has also become the subject of scientific studies because of its
intelligence and ability to communicate by using a range of sounds and
ultrasonic pulses. It adapts to captivity better than the common
dolphin, which is timid.
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