Dolphins will be cetacean mammals closely relevant to whales and porpoises. You will find almost fourty species of dolphin in 17 genera. That they vary in proportion from 1 ) 2 meters (4 ft) and forty five kg (90 lb) (Maui's dolphin), up to 9. a few m (30 ft) and 10 considerations (9. almost eight long plenty; 11 short tons) (the orca or killer whale). They are located worldwide, mostly in the shallower seas of the continental shelves and are flesh eaters, eating mainly fish and squid. The family Delphinidae, the largest inside the order Cetacea, evolved comparatively recently, regarding ten million years ago during the Miocene. this individual name is originally coming from Greek δελφίς (delphís), " dolphin",[1] which was related to the Greek δελφύς (delphus), " womb".[2] The animal's name can consequently be viewed as which means " a 'fish' with a womb".[3] The name was transmitted via the Latin delphinus[4] (the romanization of the after Greek δελφῖνος – delphinos[5]), which in Ancient Latin became dolfinus and Old France daulphin, which usually reintroduced the ph into the word. The definition of mereswine (that is, " sea pig" ) in addition has historically been used.[6]

The term 'dolphin' may be used to refer to, under the suborder Odontoceti, all the kinds in the relatives Delphinidae (marine dolphins including orcas and pilot whales) and the river dolphin families Iniidae (South American lake dolphins), Pontoporiidae (La Pasta dolphin), Lipotidae (Yangtze river dolphin) and Platanistidae (Ganges river dolphin and Indus river dolphin).[7][8] This kind of term features often recently been misused in the US, mainly in the fishing industry, where every small cetaceans (dolphins and porpoises) are considered porpoises, as the fish rubio is called dolphin fish.[9] In accordance usage the definition of 'whale' is used only for the bigger cetacean kinds,[10] while the small ones having a beaked or perhaps longer nasal area are considered 'dolphins'.[11] The name 'dolphin' is utilized casually being a synonym pertaining to bottlenose dolphin, the most common and familiar types of dolphin.[12] Killer whales likewise belong to the family Delphinidae...

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