Why do some colonies of coral exhibit bright, vibrant colors, while other colonies of the same species are brown or tan-colored? If you asked me this question a few months ago, I would have told you they have different species of symbiotic algae. New studies suggest that bright pigments produced by these corals may be a natural form of sunscreen!
To learn more about these bright pigments in corals, you can click the following links:
https://www.liveaquaria.com/general/general.cfm?general_pagesid=274
https://theconversation.com/revealed-why-some-corals-are-more-colourful-than-others-36866
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