Best thing that ever happened to mine was that it committed suicide and jumped out of my tank after 6 years. That was by far the biggest a-hole fish I've ever owned. Good luck. You will not be able to add any other fish after that tang, once it grows to any substantive size. About a year ago, I bought a beautiful, healthy Red Sea Sailfin. Different body styles, should be compatible, right? The morpho attacked the sailfin with such ferocity, you could hear the thump outside the tank when it hit the sailfin. The morph took bloody chunks out of the side of the sailfin's body, shredded it's fins, and within 24 hours, the sailfin was dead. Now, there was no way to remove 300# of acropora encrusted live rock out of a 180 to try to catch and save the sailfin. I just hoped the morph would stop, but it never did, even in the dark. It was relentless.
Did I say good luck? A blue morph has to be the last fish you add to your tank. Other than that, they are very hardy, easy to care for and will take well to nori, flake or pellet food. They are pigs.