Archive / December, 2014

Male Red Lyretail Swordtail

Red Lyretail Swordtail Experiment

One problem with raising lyretail swordtails is that the males are functionally sterile. While they produce viable sperm, they have an elongated gonopodium (a penis-like modified anal fin used to inject sperm into the female), which prevents them from mating. Lyretail in xiphophorines (members of the genus Xiphophorus containing platies, variatus, and swords) is a […]

Photo of Poecilia mexicana, Campeche

Poecilia mexicana, Campeche

We recently processed our Poecilia mexicana, Campeche. We got this wild molly species in June 2009 from Dr. Ptacek of Clemson University. The “Campeche” notation indicates that Dr. Ptacek collected the fish in Campeche, Mexico. It has proven to be one of our most popular short finned mollies. The photo shows both sexes. The males […]