by deformed i mean a molly was deformed so they started breeding it with other mollys to keep that balloon feature. i dont know if theyre more suspectable to disease or not. killifish dont NEED a species tank. get non anuals bc annuals die very quick bc thats what they do in the wild. if you do killifish i recomend any gardneri species. they will breed but the eggs or fry will get gobbled up. also some recomendations for tankmates are rasboras, small tetras (1.5 inches or less), corys, and other small peaceful fish.you can see my male killifish as my avatar.
Ah okay, well I am still conflicted on them then. I just really liked the one I had, such a fun personality. But then again, I don't like ballooning in any other fish either.. so idk.
As for killifish, I was looking on liva aquaria and prices are $29.99 for a garneri sp. are they all this expensive? And your male is gorgeous!

And yep, basically no female live bearers