很多金鱼饲养爱好者，发现自己养的金鱼有逐年退化的趋势，有的珍稀品种变成平常品种，有的甚至失去了观赏价值。这是没有重视精选金鱼、合理配种造成的。下面就谈谈这个问题：一、精选金鱼在一池或一缸同品种的亲鱼中，不能采取整池、整缸的鱼不分优劣让其混合自由交配，金鱼 Many goldfish rearing lovers find that the goldfish they raise have a tendency to degenerate year by year. Some rare varieties have become ordinary varieties, and some even lose their ornamental value. This is not paid attention to the selection of goldfish, reasonable breeding caused. Here’s to talk about this issue: First, the selection of goldfish in a pool or a cylinder of the same species of broodstock, can not take the entire pool, the cylinder of the fish regardless of the merits of merging freely mixed, goldfish