Betta Fish: Just showing off my boys (both from same spawning)

First boy, the blue one is probably the most interesting as I walk by him several times a day. If there’s fry in his tank (shared with least killifish and some white clouds).. he’s usually by the surface hunting for one. When I give him his mirror but he’s not in the mood, he’s nipped my finger while holding the ball 🤣 like “not now asshole” to me. Red & Blue boy had some fin nipping when he was in another tank, it’s gotten better but I don’t think the “feeder” guppies that were with him helped recovery any either. He’s certainly a big show off!