Lost one of my favorite fish, a purple tang I've been taking care of since 1997.
No indication anything was wrong, good body weight, good appetite, good color, water tested fine Monday, all the other fish and corals look and acted normal. It's had a good run though. It was bought initially in '95 or '96, went through three aquariums and three owners (2 systems with one owner and one system has had two owners). Since it was already large when it was bought I'm guessing it was maybe 22 - 25 years old. Considering they live 30-40 years in the wild I would think it was only late middle age but it could have been older.