this post was submitted on 14 Jan 2024
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Salmon pink (media.kbin.social)
submitted 9 months ago by [email protected] to c/[email protected]
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[–] [email protected] 13 points 9 months ago* (last edited 9 months ago) (1 children)

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.

[–] [email protected] 4 points 9 months ago (1 children)

And mercury right?

[–] [email protected] 4 points 9 months ago* (last edited 9 months ago)

Mercury is more highly concentrated in higher-level organisms in a similar fashion, yes.

But mercury itself has nothing to do with coloring.