Fish Tank Ban

hopefully this is in the right section...

I've been followin the site for a while, but just signed up and this is my first thread. My question is a bit tricky.

I live in a fraternity, and our insurance forbids fish tanks. I am getting one anyway, but I need to be careful about it. I would like suggestions. Obviously it must be small for when I get caught and have to remove it. In addition to this, the fish should be cheap and hardy in case an emergency were to occur. I'm thinkin 35 is the largest I can get away with, but I should go a bit smaller. It should also be freshwater in my opinion, to fit the cheap & hardy requirements. Is it possible to still have a tank that contains something cool with these limits? Thanks in advance.

I'm in Indiana, so that's an option, but would it be comfortable if I can only keep 1?

Our fraternity is very tame, and I own everything that is in the room, I'm willing to accept the risk. Another guy in the house has kept a bluegill in a 35 all year with no trouble.

I won't be kicked out or anything, I'm sure of it. It would be a simple slap on the wrist if they even care. They've got drugs and alcohol on their list before small fish tanks. If possible, I'd like some stock suggestions...I understand your concerns, but I've been planning it for a while and I've made the decision.