The one I saved is about 3.5" and he is in the tank with a Saddleback Butterfly, True Falcula, Scott's Fairy wrasse, Red Margin Wrasse, Exquisite Wrasse, Neon Dottyback, Purple Tang, and a bunch of mushrooms that are overgrowing my reef tank. He has only been in the tank for a week and so far he hasn't touched the mushrooms