商家的养殖环境鱼房的卫生、温度、光照、是否有养鱼日记或鱼种标记、鱼缸是否符合条件、用具是否专缸专用定期消毒、养殖设备是否齐全、水质如何、饵料如何。2鱼的品系特征品系特征鲜明突出的才有价值。接着看背鳍和尾鳍,除剑尾等特殊尾型以外,各种品系的公鱼尾鳍均要求为三角形为好,尾鳍夹角在90度以上,最好是等边三角形的。腰身要粗壮,粗壮了繁育能力才强; The breeding environment of the business fish house health, temperature, light, whether there is a fish diary or fish species mark, whether the fish tank meets the conditions, whether the special equipment cylinder special disinfection, aquaculture equipment is complete, water quality, how food. 2 fish characteristics of the characteristics of strains of distinct strains of outstanding value. Then look at the dorsal and caudal fin, in addition to the tail and other special tail type, the male fish of various strains of the tail are required for the triangle, caudal fin angle of 90 degrees or more, preferably the equilateral triangle. Waist to thick, sturdy ability to breed was strong;