虹鳟,属鲑形目、鲑科。原产于北美洲太平洋沿岸和美国加州山涧中,喜栖于水质澄清、水量充沛的泉水、地下水或山涧溪流中,也分布于河流、湖泊、水库中,因肉质鲜美、生长快,现已在我国东北、华北及朝鲜、日本与欧洲各国养殖,属于世界养殖业的优良品种。虹鳟鱼体延长,侧扁,长约30厘米。头较小,口较大,斜裂,端位。吻圆钝,两颌上有细齿。背鳍较短,无硬棘。背鳍之后还有一脂鳍,脂鳍前后均有鳞。背部和头顶部蓝绿色、黄绿色和棕色,体侧和腹部银 Rainbow trout, a salmon-shaped head, salmonidae. Originating in the Pacific coast of North America and the California mountains, hi habitat in water quality clarification, abundant spring water, groundwater or mountain stream, also distributed in rivers, lakes, reservoirs, due to the delicious meat, fast growth, now in China’s northeast, North China and North Korea, Japan and European countries breeding, breeding of the world’s fine varieties. Rainbow trout body extension, side flat, about 30 cm. Head smaller, larger mouth, oblique crack, end position. Blunt kiss, two jaws with fine teeth. Short dorsal fin, no spines. There is also a fat fin after the dorsal fin, fat fins are scales before and after. Back and head top blue-green, yellow-green and brown, body side and abdomen silver