Hi, we got the betta fish 12 days ago and he's been fine every day since we got him. He's been swimming around normally and aggressively eat his food every morning. But today i woke up to feed him to see he's barely swimming around and had no interest in eating today. When he does swim it looks as if he's having trouble. The tank is 2 gallons. The first picture is how he looked when we got him and the other 3 are what he looks like this morning. It looks as if his top fins are twisted??? If you have any idea what is wrong please help. Thanks