cavefish

Studies revealed that eye loss evolved independently at least three times among the cavefish;

研，在同品种的洞穴鱼间，丧失视力的演化过程是独立的，而且至少发生了次。

At least some of the mutations responsible for this loss of vision differed between the 29 populations of cavefish known to exist.

目前现存的29种洞穴鱼，其眼盲亦与这些突变有关，但是其基因突变的位相同。