We purchased a Tusk Wrasse in October of 2011. Initially he was not eating but we did get him to eat Krill , Mysis shrimp and Formula 1. For the last several months he has taken up residence in the corner of our 250g tank. He refuses to swim outside of the corner other then to briefly venture out for food. I don't think he has swam around the tank for months. His color and eyes are good and he does eat. None of his tankmates are bothering him. Any thoughts on what is up with him? He is a beautiful fish and I hate to see him huddled in the corner.