Diving With Dolphins

Dolphins are marine mammals that are closely related to whales and porpoises. There are almost forty species of dolphin. They vary in size from 1.2 m (4 ft) and 40 kg (90 lb) (Maui's Dolphin), up to 9.5 m (30 ft) and 10 tonnes (the Orca or Killer Whale). They are found worldwide, mostly in the shallower seas of the continental shelves, and are carnivores, mostly eating fish and squid. Dolphins evolved about ten million years ago, during the Miocene time. Dolphins are considered to be amongst the most intelligent of animals.