I recently bought two female bettas... or what I thought were two females. I began to condition them and put the smaller of the two in with my male - he seemed to love her,and even did a butt-wiggle! Unfortunately while I was elsewhere in the house she jumped out of her jar and when I saw my male next, he was in tatters (still alive) but badly in need of some medication and time alone.
My question is: would you think this is usual female betta behaviour? She/he is small, develops vertical breeding stripes while near the male, has an ovipositor, and has short fins. Do male bettas ever get breeding stripes? It's quite possible that she could be a male plakat, but if I'm going to return her/him to the store I want to know for sure that I just don't have a super aggressive female.