Sorry, I don't know how old it is, because I have only had it for about two years, in which it has grown about an inch. I do know that these guys live forever. It is in a 120 gallon aquarium and is fairly active, but I don't see it eat much. It hids behind some rocks when the light is on, but a couple seconds after the lights go off, It will be out and about, sometimes swimming as high as the top of the tank. I occasionally hear a buzz every now and then. I have touched him during water changes and the only think I can compare it to is a cell phone on vibrate. The guy that I got it from has actually been pinched by it. He said that it wouldn't let go for a good two minutes. He also said that it "stung" him once, causing his arm to swell up for a day or two. I didn't really know these guys had poison. Overall, Raphaels are great peaceful catfish, but they do get big.