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European bullhead : ウィキペディア英語版
European bullhead

The bullhead〔(''Cottus gobio'' ) IUCN Red List 2009〕〔 (''Cottus gobio'') is a freshwater fish that is widely distributed in Europe, mainly in rivers. It is a member of the Cottidae family, a type of sculpin. It is also known as the miller's thumb, freshwater sculpin, common bullhead and European bullhead.〔
The bullhead is a small demersal fish that lives both in cold, clear, fast-flowing small streams and in middle-sized rivers. It also occurs on gravelly shores of cold lakes. Further, it thrives in diluted brackish water of the Northern Baltic Sea.〔
==Description==
The bullhead has a large broad head and tapering body, large fins and a rounded tail. The eyes are located near the top of the head. This fish resembles the Alpine bullhead and the freshwater form of the fourhorn sculpin, which also occur in Northern Europe. It can be told from the Alpine bullhead by the fact that the rays of its pelvic fins are of similar lengths while the first and last rays are longer in the Alpine bullhead. It can be distinguished from the fourhorn sculpin by the fact that the dorsal and anal fins terminate close to the tail giving a short caudal peduncle. When it rests on the bottom, the pectoral fins flare out resembling wings. The bullhead is usually about long and is light brown mottled with darker colour. The pelvic fins are colourless and lack the stripes of the Alpine bullhead.〔(【引用サイトリンク】title=Bullhead: ''Cottus gobio'' )

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