He is beautiful! I saw one that looked a lot like him today at PetsMart, it was tempting . I've always found bettas to be completely passive with any fish other than other male bettas, but I've still never had a lot of luck when I've put them with other fish, even though they were docile types (mollies and tetras), there always seemed to be one or two that would pick at the betta's long flowing tail/fins and make them ragged. I always ended up taking them out and putting them in their own tank again. That's a beautiful aquarium