i have a orcellalris clown fish ive had for 2 years now its been in its new tank for about 2 weeks now coming from a 20 gallon to a 55. what worries me is that the fish has not moved out of its spot yet. it just stays in the corner of the tank and moves up and down the side. it seems weird to me that he only stays in that spot. right now that is the only fish i have that made it when i moved houses. other than that i have some small reef hermits a couple of snails a peppermint shrimp and a black long spine sea urchin. should i be concerned about the fish.