Various types of dolphins are 4-30 feet(1.4-9 meters)long. They weigh from 100 lbs. (45 kg) to 5 short tons (4.5 metric tons).
Familiar types of dolphins are:
- bottled-nosed dolphins: Tursiops truncatus lives in all oceans. Length is up to 15 feet(4.6 m)
- common dolphins: Delphinus delphis lives in all oceans. Length is up to 8 feet(2.4 m)
- common porpoises: Phocoena phocoena lives in all oceans. Length is up to 6 feet(1.8 m)