attached is a pic of my favorite swordtail. he is a lyretail hi fin swordtail. and he has an abrormally long growth on the bottom, but im not sure if you can see it, the quality of the camera i used is very bad.
nope it not pooing cos its coming out of if stick (gopodeim or whatever) the thing they use to make babies. is often elongated when long fin varieties of swordtail are bred. it can't have kids easily though but are normally breeaa for there pretttiness hope that made sense and was useful