here's a picture from my phone, it's small but I think it shows..
I'm almost postive the little blue blop in front of it is him x3 but after I took it he was on the other side of the tank so I didn't see him for sure. P: still he's the only fish in there and those look like fins and it's navy, so ^-^
it's more wide than long I think, doesn't look too bad does it?
as to the air thing, I guess maybe not haha, I'm not really sure how much they need the air when they choose to go up to get it >< since they obviously need it to some extent if they're going to get it DX but I guess they wouldn't cut it too close.. >-^
and aww, haha, I love catching them when they do things like that, it's so adorable :D Betta Fish are so much fun when you really watch them ^-^ thankyou for the help :D
ahaha, the hide and go seek part is so cute :D
JKFish- thanks, ^-^
when I held it out for him outside his tank for him to see before adding it in, and when I sat it down for a minute to the side while I looked at another mug my mom had brought me, he inspected it and swam around its area both times wiggling his tail, and when I finished cleaning it and stuck it in his tank he went to inspecting it immediately again, poking at each of the sides, so I think he can see it and differentiate it. he left it right at the end and settled for sleeping beside it up under the edge instead of inside it at last minute last night, so I just turned off the light and left before he could have a chance to change his mind. now that it's day I'll try to watch him more to see if he does understand the difference. if he can then I think it should be alright, thankyou :D