oh yeah, i have at least 1 more question...

i have 1 male betta in a 1 gallon "aquarium". the last couple of
days, when i check on him after i get home from work, sometimes i see
him flaring. i don't have a mirror or anything that i can think that
may be reflecting his image back at him, so what is the deal? i did
hold a mirror to him twice just to see him flare, but that is it. so,
any idea why he is flaring just out of the blue like this?