So I have a 15 gallon tank that has a divider in it and is only filled with about 10 gallons. One side has a male and the other a female Betta. Yesterday I changed the water, and after i was done i failed to notice that there was a good bit of extra water in there.
Long story short, when i woke up this morning i found the male on the female side of the tank. (Jumped the divider i suppose) I couldn't find any damage done to them, maybe a few nips on the females fins, and they weren't fighting or being aggressive.
Although they were swimming around each other and the male would wrap around the female, turn her on her side/upside down and then let go of her. Then he'd touch his head to his side and fall to the bottom of the tank, sit there for a moment and then swim up and float around the plants again. And the female seems to be less active then she was before the incident.
At first i though he was dead and paniced. But I'm thinking this was them mating, but i just wanted to make sure they were ok.