I bought this guy a couple weeks ago from Petco. His cup said he's a delta tail but when he flares he looks kind of halfmoonish. So yeah, I can't really tell which one he is. Ah yes, his name is RedRum II. lol Sorry these aren't very good, he wouldn't fully flare for the camera. Kahlua and the betta. Guess the betta doesn't like my bird.