no one said that it got that big in THAT Tank... just that he is looking for a bigger tank...could be a fish that was given to him and he thinks asian style looks cool.
Either way I wouldn't want to be the one to reach in there to pull out that ARTC.. might pull back a nub Not only is it an agressive fish but I'm willing to bet it's a pissed off one as well in that little tank.
It's 22hrs after I saw this thread for the first time and my reaction is still the same when I see the pic...
Just think, he probably had a bunch of mollies or tetras or something in that tank to start with... got the ARTC and suddenly! -- Disappearing act! no more cute little friendly fish