I got this guy on Saturday from a fish store in Palm Bay, Florida. I believe he's a male from his sucker size. He's from Haiti, I think he may be O. Vulgaris. I will post better pics soon, but they're on my other camera. He is primarily brown with a white underside. He changes colors very quickly and changed either completely white or brown/purple with white streaks. I've got a 92 gallon corner aquarium, all of the water tests have been good. There's 100lbs of live rock in the tank. The salinity is a bit low, but I'm raising it slowly. He was active upon first being in the tank, but since has picked a den and I haven't seen him do much but stick a tentacle out. There are some snails and crabs in the tank, along with four damsels that I assume he will eat. When should I be worried if he doesn't start eating? He's been in his den for about 40 hours now. I'm not sure if he's come out at night though. Any thoughts would be appreciated!