剑尾鱼又名剑鱼、清剑,原产墨西哥南部及危地马拉等地,经人工优选培育,已育出现了不少新品种,如红剑鱼、黄剑鱼、鸳鸯剑鱼等。目前饲养较多的为红剑鱼,依背鳍和尾鳍形状分为两类:一类是背鳍高宽,尾鳍上下末端均有剑状延伸的高鳍燕尾红剑;另一类是雄鱼背鳍很长,尾鳍下部末端拖带 Swordtail fish, also known as swordfish, Qing sword, native to southern Mexico and Guatemala and other places, artificial breeding, breeding has emerged a lot of new varieties, such as red swordfish, yellow swordfish, duck swordfish. Currently more red swordfish, according to the dorsal fin and caudal fin shape is divided into two categories: one is the dorsal fin width, caudal fin both upper and lower ends of the sword-shaped extension of the high-end swallowtail red sword; the other is the male dorsal fin very Long, caudal fin tail towing