dolphin facts

• Dolphins can swim up to 260 meters (853 ft) below the surface of the ocean.
• Dolphins can stay up to 15 minutes under water.
• Its name comes from the Greek word δελφίς (delphís), "a 'fish' with a womb".
• Dolphins use a technique called echolocation to find food and navigate.
• Dolphins are closely related to whales and porpoises.
• The largest dolphin is the “killer whale” (also known as Orca).
• Dolphins lack an olfactory nerve and lobes, and thus are believed to have no sense of smell.
• Dolphins are warm-blooded.
• Dolphins are the only animals other than humans that develop a natural form of type 2 diabetes.
• Dolphins breathe through a blowhole on top of their head.
• Some species have up to 250 teeth.
• The dolphin's head contains the melon, a round organ used for echolocation.
• There are almost 40 species of dolphin in 17 genera.
• Dolphins 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 (killer whale).
• Dolphins mostly eating fish and squid.
• Dolphins are among the most intelligent animals, and their often friendly appearance and seemingly playful attitude have made them popular in human culture.