Have a 55gal tank with a Lunare Wrasse, Sailfin Tang and a Niger Trigger. Also 3 Hermit Crabs. I joined the forum because of my Lunare Wrasse, he changes color and I wanted to know if that is him changing sex, is unhappy or what. He has had several homes before us and is my fish, I will do whatever I can to make sure he is happy and healthy. I know my tank is too small we do plan to upgrade.