Ok so my boyfriend has taken to my fish addiction and now wants a tank of his own. The problem: he has always loved puffer fish and would like a few of them. The LFS has dwarf puffers but these guys look kinda scrawny and just sit in the bottom of the tank. Im looking for something thats FW and dosnt get huge. Any suggestions? Also what could go in with them? I have read that they can be quite aggressive. Thanks!