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黑龙江流域只有两种鲟鱼:一种是达氏鲟,也叫鳇鱼;另外一种是史氏鲟,当地人称之为七粒浮子。而从达氏鲟的生活区域上划分,又可以分为三个种群,即黑龙江河口种群,黑龙江河道种群和鄂霍次克海和日本海沿岸淡水水域种群。达氏鲟身体呈圆锥状,腹面扁平,吻尖突出,呈三角状。它的身体呈淡黄色,或者灰黄色,腹部白色,是一种极其凶猛的食肉性底层鱼类。平时多栖息在江河一些水流比较平稳、沙砾底质的地方,很少到浅水区域活动。别看鳇鱼个体很大,但它们觅食却一直十分活跃,一年四
There are only two kinds of sturgeons in Heilongjiang valley: one is Dart sturgeon, also called catfish; the other is Sturgeon, which locals call the seven sturgeons. However, it can be divided into three groups according to the living area of Dartmoor sturgeon: the population of Heilongjiang estuary, the population of Heilongjiang River and the population of freshwater in the Sea of Okhotsk and the Sea of Japan. Bearded sturgeon body was conical, ventral flat, prominent snout, triangular. Its body is pale yellow, or yellowish, white belly, is a very ferocious carnivorous underlying fish. Usually more than the rest of the rivers in the relatively smooth flow of water, gravel sediments, rarely to shallow water activities. Do not look very large mullet fish, but they have been very foraging for food, four a year