Hello. Well, I'll start my question out by saying that my cable and internet went out last night so I spent over an house just staring at my fish last night. With that out of the way, I have four neon sword tails in my tank. Two I purchased at the store, and two that were born in my tank. I do know that they are live bearing fish. My question is do live bearing fish (for lack of a better term) have sex? I know that with egg laying fish the semen is just kind of spread around the area of the eggs. But last night in my ultimate bordum (I should have been cleaning the house or something) I saw the store bought male and female "wrestleing around". But it wasn't the normal kind of fighting that I see with the other fish, no poking with the nose or chasing around the tank. This time they were up near the top, side by side and sometimes belly to belly. It went on for around 10 minutes on and off. Were they mating?