“察颜观色”鉴别同池同种的鱼种(苗)是在同一时期统一孵化培养的,因此,在同一培育时间和同一饲养管理方式中培育的鱼苗的个体规格比较一致,应无明显差异。一般情况下,同池同种同期捕捞的鱼苗中特大、特小鱼种所占比例在 “Cha Yan color” to identify the same pool of the same species of fish (seedlings) are incubated in the same period uniform culture, therefore, in the same breeding time and the same feeding and management methods to breed fry individuals more consistent, there should be no obvious difference. Under normal circumstances, the same pool with the same species of fish caught in the same period, the proportion of extra-small fish in