ghostnote said:i hate to be a nay sayer,
but i looked into it for a while when i was thinking about setting up a tropical tank. and decided as cool as they are, they just arnt worth it for me. they dont live long in the wild. a year to two. and will live even shorter life spans in a tank. plus they'll eat everything. and will try to escape when ever your not looking (and maybe even when you are)
but if you do get one.. stay away from anything with a blue ring on it.