I have two Jack Dempseys, I'm not sure if they are mating or fighting. I know one is a male, but the other one is an odd fish. They are both around 6 or 7 inches. I have had them for about a year but the other day they were locking lips and yawning while they bumped into eachother. I tried to vent the one that could be a female but she is inexperienced so it was hard to tell. The vent was definitley darker though. Any help would be great! I have a video of them doing this behavior.