red = free lunch...interesting
I think I get it:
If a salmon is eaten before it procreates, it fails in it's mission and the species does not replicate in that instance.
So, to improve the odds they stuff the predators with dead fish.
The salmon that have *already* procreated and are dead turn a bright color, offering themselves to the predators. This keeps the predators away from the still-camo, not-yet-mated salmon, who are then that much more likely to succeed in reproducing.
Once again I am amazed by the efficiency of nature.
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