Seen most often is Xiphophorus helleri, or the Green swordtail. That said, most variants commonly imported nowadays are far from green, as mass farming efforts are producing every colour under the sun ...

Any advice is welcome. A: Neale replies: Female Platies, at least, will not cause problems for your Swordtails. Your male Swordtail will simply view them as potential mates, and act accordingly. So, ...