a 10 would be much nicer. Molly fish, or just mollies, are freshwater fish from the genus Poecilia, in the Poeciliidae family. There are currently 40 species in this genus, so 39 of them are mollies. I'd be surprised if your aggressive molly was a female but if so, I'd take it back to the shop and try again with some new mollies. Breeding: Things to do for Successful Mating. They have a fanned anal fin, not a pointed one. I have 3 sailfin Molly's in there (midnight which is the all black one and only male, kiwI is the orange one, the gray/black one is Ashe..I have ghost shrimp, and a bristle nose pleco full grown just about. What I would do if get rid of the Dwarf Gourami then get this 40g … Hey guys! Moreover, the dalmation Mollies breeding process is usually easier, as the females are mostly larger than the males. Now livebearers can change sex which makes things more complicated. All the species in this genus are mollies except for the Endler’s livebearer. A caring fish breeder will keep a 50-gallon tank for the fry to grow up in and will feed them micro-worms and newly hatched brine. I just asked a question about my male black molly annoying my female dalmation molly. Mollies … I even took out the female dalmation molly for a bit, and the male STILL showed no interest! I even took out the female dalmation molly for a bit, and the male STILL showed no interest! Not to mention the Mollies do like a male female ration. Putting it in a different tank would assure its safety and it can give birth to the babies without any fear. The females fin is rounded and looks like a normal fin, the males have a long skinny tube-like fin. But anyways, my dalmation molly gets so stressed out by my male that she starts nipping at my 4 albino corys and my … In return, the female will feel harassed, lost her appetite and thereby, die as a result. However, the anal fin is the simplest way to tell. You can tell them apart as the males are slightly smaller and slimmer and have the distinctive gonopodium. Always put the female Molly in a separate tank at the time of the labor. Moreover, if the males outnumbered the female molly, their appetite is often aggressive.