hi i just wanted to know what betta that you have is the best at flaring mine is shimmer my newest one too he is always scaring off fish in my tank don't forget to post a pic
My betta Starburst starting flaring at his bloodworms untill he finally realised they were food and you could eat them. Starburst also flares at my fingers (he's actually bit me before!), lamps, and just about anything he sees moving.
My best flairer is Coral Reef, and the reason for that is he flairs at me. Every time I go to his tank he flairs and spreads his gills and shows his fins there to. I beat though he doesn't realise I could have left him in that little cup in the pet store.
All my bettas flare the best. The betta in my 1g will flare at my finger if I put it in the tank and the betta in the 2.5g won't flare at my finger he goes straight for the kill and bites my finger. But the betta in the 1/2g won't flare or attack he goes and hides behind the plant.