Yellow Coris Wrasse
If you like a splash of yellow in your tank, the Yellow Coris Wrasse is a nice choice. As it picks through the rockwork and corals, it will consume some pests too. As it ages and increases in size, it may eat some snails in addition to the normal food offering. This is a known jumper, so cover the tank as well as the overflows, as it may travel south into the sump.