Yeah, I read a little about these fish, and there are some people that claim that they are very peaceful. However, the majority seem to claim that after placing them in a community tank, certain fish seemed to disappear overnight. They also can grow very large (20 inches!!), so they absolutely need a big tank -- although I've never personally seen one larger than 6"
My brother bought one from the LFS a few months back and it disappeared the first night in his 50g tank, so good luck!