Originally Posted by indjo
It is unadvised to keep them in sight of another betta. Some may become uninterested (color remain vibrant) but some may become stressed or afraid (color fade). They will flare or fight back if they feel a real threat (if there's another betta in the tank). And these can be bred. But the stressed ones sometimes need time to gain their courage and often hard to bread.... but they will breed. Further their fins would eventually clamp if they never flare.
But if for no apparent reason a betta stops flaring, specially during spawning or introduction, there is usually something wrong. A healthy betta would practically flirt all day. They rest while they work on their nests.
The picture doesn't show any signs of stress or health issues. Maybe this is his problem.
that's the thing. >.> Ichi didn't change. Theo can't see. Ichi didn't start tail biting till Zidane came into his sight(by total accident, mind you). my thought is, its because Theo's white, and can't see to get aggressive with Ichi, so Ichi figured Theo's not a threat. Ichi went about his business, doin' his betta thing.
mind you, i don't plan on breeding Ichi, nor Theo.
and, i've tried everything short of cupping one of my males and putting him in Ichi's tank, in the cup, to get Ichi to flare. o.0 he just... won't... do it...