I got Mr. Big about a week ago from WalMart. He was my first Betta and I'm kind of worried about him.
His fins are all cramped up, and look stiff and clumped together. His top fin is also bent a little... I don't know how to explain it. His water is not cold, the thermometer reads around 82. Could he be too hot?
Heres a picture, sorry its so crappy but it was all I could get with my cellphone cam. He moves around a lot.

Little bugger, hehe.
He also will not flare for any reason. I tried putting a mirror up to him, no luck. He also won't flare at my other new Betta that I got today (but the new Betta flares at him). Instead, he swims quickly away and hides. Could I be that I just have a very passive male?
Only thing I have changed is that I gave him a freeze-dried bloodworm sunday night. He enjoyed it a lot... nothing else has changed.
Is he sick? What should I do?
(He still swims around normally, expect for his fins being stiff. He eats just as much as normal... 2 betta pellet things in the morning and 2 at night.)