10/20/2026
Why are some krill pink?
Their color comes mostly from carotenoid pigments in the food they eat, especially phytoplankton. One of the main pigments involved is astaxanthin, which can give krill their reddish-pink color.
It’s a similar idea to why animals like flamingos and salmon can develop pink or reddish coloring from pigments in their diet.
So that pink color isn’t random. It can actually reflect what krill are eating in the ocean.
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