My new (5 days since adoption, I think) betta, Barbossa, seems very reserved. Is this normal male betta behavior? He lays at the bottom of the tank until it's time to get air. He might occasionally swim around otherwise, but he seems to prefer the bottom. I have a filter, so I know he's getting air that way too, but it seems sort of frequent how many times he goes up. But otherwise, he doesn't eat much (if at all), and seems tired/bored. I understand I don't have anything for him to play with, and I'll try to change that soon and add more decor to his tank. But I held a mirror up to the wall tonight and he didn't flare. His mouth opened REALLY wide once (it actually startled me, because I didn't know their mouths could open so wide, haha), but I think he was yawning?! He must be bored!! Jeez! But he didn't flare. Maybe he didn't see the reflection. :/ He doesn't look ill otherwise. His tank is a little warm at about 85F, I think, so I'm trying to bring that down. He hasn't eaten to my knowledge since the first few days he was home. Help?