Well, Dr. Bruce, the morale of the story might be:
1. It all depends....
2. Never be overconfident when it comes to fish....
3. Never count your chickens before they hatch....
4. There are a million ways to kill fish....
5. It's the habitat, stupid.... (hear the Bob Lusk voice there?)....
I'm sure there are many more such morales, morels, or others.