Hey maybe they aren't straight? I have a female convict who I swear is the biggest slut. She is trying to mate with my female Nicaraguan and is confusing the heck out of the Nic. It's so funny, the convict rubs up next to the Nic and helps her tag team any other fish who get near her girlfriend. I think she might be bisexual, so it is possible your fish are on the down low, lol.
