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The eel-tailed catfish, ''Tandanus tandanus'', is a species of catfish (order Siluriformes) of the family Plotosidae. This fish is also known as dewfish, freshwater catfish, jewfish, and tandan.〔(【引用サイトリンク】title=''Tandanus tandanus'' : Freshwater Catfish )〕 This species is a freshwater fish native to the Murray-Darling river system of eastern Australia.〔 The scientific name for eel-tailed catfish comes from an aboriginal name for the fish - ''Tandan'' - which Major Thomas Livingston Mitchell recorded on his 1832 expedition. ==Description== Eel-tailed catfish commonly grow to about 50.0 centimetres (19.7 in) and weigh about 1.8 kilograms (4.0 lb).〔 Fish of this species may grow up to about 90.0 cm (35.4 in) and weigh up to 6.0 kg (13.2 lb).〔 Eel-tailed catfish may live up to about 8 years.〔 Eel-tailed catfish have large head with thick and fleshy lips and tubular nostrils.〔 The skin is tough and smooth. Body coloration in adults vary from olive-green to brown, black or purplish on their backs and white on the underside.〔 A downturned mouth with fleshy lips surrounded by a number of barbels assist them with feeding. They are a solid, almost cylindrical, elongate fish, with the posterior half of their body tapering into a pointed eel-like tail. A continuous fin margin surrounds this tapering posterior half of the body. Their eyes are small. The eel-tail catfish has 4 pairs of barbels surrounding the mouth, and sharp serrated dorsal- and pectoral-fin spines which are venomous and can cause a very painful wound.〔Martin F. Gomon & Dianne J. Bray (2011) (Freshwater Catfish, Tandanus tandanus. ) Fishes of Australia. Retrieved 29 Aug 2014.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Eel-tailed catfish」の詳細全文を読む スポンサード リンク
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