Lol I saw a 15 year old raphael in an aquatics center in Peterborough. It was larger than 8" by a fair margin. Beautiful creature.
I have 3 somewhat smaller beasties, including a spotted version. I rarely see them unless I move the tank furniture around or suprise them at night. They spend the majority of their time in their large cave home ignoring me entirely. I have heard they will eat any fish small enough to fit in their mouths. Mine live with some big fish so it doesn't worry me much and they do make the cutest squeeking out of water.
Mine feed on the catfish pellets and algae wafers I put in for all my bottom dwellers, plus bloodworm and various other meaty things occassionally. So easy to feed, hardy, tough and somewhat secretive.
P.