I agree Bill!
How many people take a dead fish and cut it apart (and really look at it vs. cutting it apart to put in a pan)? If Cecil didn't do that to his dead fish, how would he learn about fatty tissue build up, etc.?
Observation, and thinking about what you observed is a huge part of all aspects of pond management. Pond management is also fish management, and I think Cecil has a very good handle on that.