The pretty swordtail breeding form Xiphophorus hellerii Wagtail Red White is still young, it was only created in our millennium. The animals are descendants of the red and white “Koi swordtails”, which by the way are mostly born red and in which the white areas only develop with increasing growth.
These fish have less silvery scale dye (guanine) than “normal” swordtails, therefore the gill covers appear transparent, the blood-red gills shimmer through. The red body colour in the red-white Koi swordtails – and thus also in the black-finned Wagtail variant – appears for the same reason as a kind of transparent orange-red, which gives it its special charm.
For our customers: the animals have code 420043 on our stocklist. Please note that we only supply the wholesale trade.