Brook Trout河鱒

Fish species：Brook Trout（Salvelinus fontinalis）
Other name：Eastern brook trout, Brook char, Speckled trout, Square tail
Size：23cm
Pattern：毛蟲毛鉤（ Caterpillar Fly）
The angler：Wesley Tso
Time：2006.
Place：日本 日光湯川(Niko Yu Stream, Japan)
Note：河鱒是最接近Char(註)的一種鱒魚，但牠的生活史、生態習性與棲地卻更接近棕鱒與虹鱒，不過基本上牠比虹鱒與棕鱒更偏好低溫，但牠卻是Char一類的魚中，最耐高溫的。

Brook trout closely resemble to Char, However, his life history, habit and habitat are much similar to rainbow trout and brown trout. Basically, brook trout prefer low temperature than rainbow trout and brown trout. But it is the trout of Salvelinus fish which can endure higher temperaure.

原產加拿大與美國東部，1902年由美國移入日本湯ノ湖（湯川上遊），後移植本州中部以北的泉水溪（雪水）。外觀最大的特色在於體背有變形蟲紋路，且體側具有紅斑點。一般溪中多在15～40公分，入湖泊或老成鱒可達50公分。

Brook trout occur in Canada and eastern America. Brook trout was introduced to Niko Yo Lake in Japan, later, to the spring creek in the north Honshu. One of the obviously character of brook trout is with the line like amoeba shape on its back, and with red dots on the body. The size of brook trout which in the stream is about 15 to 40 cm, and the trout which lives in lake or the mature one, the size could be over 50cm.