红点鲑 Salvelinus leucomaenis hóng diǎn guī

红点鲑， Salvelinus leucomaenis，分布于欧洲和美洲沿岸的环极地区以及北极的岛屿，是深入北极区最远的淡水鱼。在北冰洋水系，该种主要是溯河性类型，但在一些湖沼中也存有定居类型。溯河性红点鲑长达70厘米，重达4公斤。在新地岛，红点鲑在河上游的湖沼中过冬。6～7月份，开始游入海中，海中的红点鲑成鱼以各种小鱼为主食。红点鲑的幼鱼主要分布于咸、淡水湖及河的下游，以摇蚊科的幼虫、水跳虫及桡足类为食，随着生长，较大时则主要以飞虫为食。

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Salvelinus leucomaenis, distributed in the circumpolar regions along the coast of Europe and America and the islands in the Arctic, is the farthest freshwater fish in the Arctic. In the Arctic Ocean system, this species is mainly anadromous, but there are also settlement types in some lakes and marshes. Anadromous salmon is 70 cm long and weighs 4 kg. In Xindi Island, red spot salmon spend the winter in the lakes in the upper reaches of the river. From June to July, they began to swim into the sea. The adult salmon in the sea take all kinds of small fish as their staple food. The larvae of red spot salmon are mainly distributed in the lower reaches of salt and fresh water lakes and rivers. They feed on Chironomidae larvae, diving insects and copepods. As they grow, they mainly feed on flying insects when they are large.