石门湖位于长江中下游的安庆市境内,湖水与江相通,湖中水位随江水的涨落而变化。每年夏季,江水上涨,大量鱼群由江中涌入湖内。鳃鱼就是其中一种。 鳃鱼是生存于江河湖泊中的一种野生鱼类。此鱼生性凶猛,游速极快,以食小鱼、虾类为主,体重千克至十几千克,最大可达数十千克,但罕见。每到秋季退水季节,石门湖与长江相连的出口处被 Shimen Lake is located in the middle and lower reaches of the Yangtze River in Anqing City, the lake and the river are connected, the lake water level changes with the river water changes. Every summer, the river rises and a large number of fish swarm into the lake from the river. Gill fish is one of them. Gill fish is a kind of wild fish living in rivers and lakes. This fish raw ferocious, very fast speed, with small fish, shrimp, weight kilogram to more than ten kilograms, up to tens of kilograms, but rare. Each fall season, the exit of Shimen Lake and the Yangtze River was