Dolphin - Dolphin

Japanese: イルカ(海豚) - イルカ

A general term for small species of toothed whales in the order Cetacea. Generally, whales are those with a body length of 5m or more, and dolphins are those with a body length of less than 5m, but this is not a strict distinction. They usually live in schools in the sea and eat fish, squid, etc. They are said to be highly intelligent, but there is no proof. Dolphins communicate with each other using sound waves. There are many species, including beaked common dolphins, bottlenose dolphins (also known as Pacific white-sided dolphins), and Pacific white-sided dolphins, as well as beakless species such as finless porpoises, killer whales, and Dall's porpoises. Male bottlenose dolphins are about 3m long, females 2.9m long, and are used in habituation shows. → River dolphin

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

鯨目ハクジラ類のうち小型な種類の総称。一般に体長5m以上のものをクジラ，以下をイルカというが厳密な区別ではない。ふつう海に群生し，魚，イカなどを食べる。知能が高いともいわれるが，確証はない。イルカ同士で音波により意思伝達を行う。くちばしのあるマイルカ，ハンドウイルカ（別名バンドウイルカ），カマイルカなどと，くちばしのないスナメリ，シャチ，イシイルカなど種類が多い。ハンドウイルカは体長雄3m，雌2.9mほどで，よくなれショーに使われる。→カワイルカ

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