Sad, sad day! My Lemon Peel Angel, Centropyge flavissimus, purchased in 2004 died.
There's no data on how long this species lives in the wild but the closely related Bicolor Angel, Centropyge bicolor, has reported life expectancies of 1-13 years. What bothers me is it was looking really good up to when it died. I've seen old fish (particularly wrasses) kinda look "ratty" like an old dog or cat so I was hoping it would live a lot longer.
https://www.youtube.com/watch?v=OLwnnJ9Ui9k

https://www.youtube.com/watch?v=OLwnnJ9Ui9k