dont get damsels, you'll regret it. if you want a hardy fish that you dont want to kill, but just want to kind of "test the waters" on, just get a small clownfish. About 15-20 bucks at most LFS. Clownfish are a type of damsel, so they're pretty much unkillable, compared to most "normal" saltwater fish. Mine lived through an ammonia spike of 4.0 (extremely extremely high lol). Plus, when the tank settles down and gets where it needs to be, you won't mind having the clown, but you'll HATE the damnsel. It will kill/harass everything else you put in the tankfrom now until forever, and they're impossible to get out once in there.