剑尾鱼

Females may NOT be physiologically able to reproduce; in particular, older females may be infertile.

母剑尾鱼可能不能生育， 特别要指出的是， 老年的母剑尾鱼可能会绝育。

The BY-F swordtail fish are susceptible to develop cataract.

剑尾鱼是白内障的易发群体。

Therefore, the dwarf mutation in X. helleri is caused by the developmental defect in spinal column, and the vertebral malformation underlies the body type alteration anatomically.

因而推测，剑尾鱼的侏儒突变是由于脊椎的发育缺陷所致，椎体异常是其体型变化的结构基础。

The fish has many colour forms; the general body colour is either olive-green or orange - red and fading to yellow on the belly.

剑尾鱼颜色纷繁，但躯干一般以橄榄绿或橙红为主，腹部渐转为淡黄色。

Objective To explore the cataract development and its influence on the living status of BY-F swordtail fish.

目的了解BY-F近交剑尾鱼白内障的发展及其对剑尾鱼生存的影响。