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虎嘉鱼体型各项比值除体长与眼径、口宽与口高外，变异系数均较小，因而稳定性较高。年龄鉴定用计算生长环线数的方法，准确度很高。体长与年龄、体长与鳞长呈直线关系；体重与年龄、体重与体长呈指数曲线关系。幽门垂长度随体长增长而增长，幽门垂数变异系数高达９２．０８％。体长１１ｃｍ以下时，以水生昆虫为主食，体长４０ｃｍ以上时虽以鱼类为主食，但仍摄食相当数量的水生昆虫。生殖季节无追星，从生殖孔构造可准确辨别雌雄。筑窝产卵，窝口径１５０～３００ｃｍ，受精卵无粘性，卵径３～４ｍｍ。
In addition to body length and eye diameter, mouth width and mouth height, the coefficient of variation of Hu Jiayu’s body shape is smaller, so the stability is higher. Age identification method used to calculate the number of growth rings, high accuracy. Body length and age, body length and scale length showed a linear relationship; body weight and age, body weight and body length showed an exponential curve. Pylorus vertical length increases with body length growth, pylorus vertical coefficient of variation as high as 92.08%. When the body length is below 11cm, aquatic insects are the staple food. When the body length is more than 40cm, fish is the staple food but a considerable amount of aquatic insects are still ingested. Reproductive season without star-catching, from the reproductive pore structure can accurately identify male and female. Nesting spawning, nest diameter 150 ~ 300cm, egg no sticky, egg diameter 3 ~ 4mm.