Can anyone tell me how to know the gender of firemouths, I got 3 yesterday about 2", 2 of them are slightly larger than the third and have light colored bodies, cant guess anything looking at their fins. Two of them were always flaring their gills and fighting each other(now i removed one of them), the smaller(dark) one is sometimes being chased off and it never flares its gills, comes into submissive stance showing its bars when its attacked by the others, and it didnt marked its territory either. So can I guess that the smaller one is female.
