What's worse, there is a decent chance at least one bear has, but there was no way for him to convince any other bear. All the right circumstances had to line up perfectly for that random campsite he ate at to have that specific meal be interrupted. And bear language doesn't have the nuance to convey just how much better it was than raw.
Carotenoids are produced by algae, plants and certain fungi.
Feeding fish higher-level animals in the food web (like crustaceans or fish that predate on crustaceans) concentrates the carotenoids and brings out more and more color in the fish, specifically red.