金鱼的祖先为鲫,属于鲤形目鲤科鲫属,是野生鲫经过近1000年的人工养殖和选择,培育出的观赏鱼品种,因此金鱼的主要习性和遗传基础都与鲫相似。金鱼为亚热带及温带淡水硬骨鱼类,底栖生活,偏植物性的杂食性,摄食植物籽实、底栖生物、浮游动物和有机碎屑等,最喜食枝角类(一类浮游动物,俗称鱼虫、红虫、水滋等),对人工颗粒饲料接受度高,适应生存水温 The ancestor of goldfish is crucian carp, belonging to Cypriniformes carp. It is the ornamental fish cultivated by wild crucian carp after nearly 1000 years of artificial breeding and selection. Therefore, the main habit and genetic basis of goldfish are similar to that of crucian carp. Goldfish is a subtropical and temperate freshwater bony fish, benthic life, partial vegetative omnivorous, feeding on plant seeds, benthic organisms, zooplankton and organic debris, the most popular edible angle class (a class of zooplankton, commonly known as Fish insects, red worms, water, etc.), artificial pellets feed acceptance, adapt to the living water temperature