xiphophorus variatus

Introducing a Dominant Gene

Photo: A male Hifin Redwag Swordtail. I’m beginning a blog series on introducing new genes (technically alleles, but I’ll bow to common usage) into a xiphophorine population. In this blog I’ll discuss the mechanics of introducing a single dominant gene into a xiphophorine population. By the way, ... Read More

Blue Iridescent Swordtail

Photo: An early male Blue Iridescent Swordtail used in the development of the strain. We raise a variety of commercial swordtails. While these fish closely resemble the shape of the wild swordtail Xiphophorus hellerii, they are hybrid strains with genes from other Xiphophorus species such as X. ... Read More