鱼苗经过短时间的培养，体长达到3到13厘米之间的幼鱼称为鱼种，又分为小规格鱼种，中规格鱼种，大规格鱼种。
n. fingerling
由于只有少数几个潜水员进行捕捞，而且他们会注意不造成过度捕捞的现象，所以潜水员的持续活动显然不会对公主鱼种群造成严重危害。
Since the divers limit their catch to a few individuals and take care not to overfish, the divers' continuing activities will clearly not result in serious harm to populations of princessfish.
一项行动正在展开来拯救一个鳄鱼种类使其免遭灭绝。
An operation is beginning to try to save a species of crocodile from extinction.
四齿鲀科族里共有超过90个河豚鱼种类。
There are over ninety species of pufferfish all belonging to the family Tetraodontidae.
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