Maroon Clown sick or not?


Hello everyone,
My Maroon clownfish has been lying still all day long, moving very little. He/she did eat today at feeding time but then promptly went back to his/her area and laid at the bottom again moving very little even in full light. I've had the fish for almost 7 years now and i'm wondering how long they live, he/she was full grown when I got him/her. May have grown a little since purchase.
I have no pics had to work tonight, nothing else in the tank is showing any ill effect, no new additions. So what do you think, nearing the end? feeling under the weather? or just being a clown... no pun intended lol...