Altered by Infection: The Science Behind “Gold” Fish

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Altered by Infection: The Science Behind “Gold” Fish

In this video, fishkeeping expert Oliver Lucanus highlights a South American parasite with a fascinating – but deadly – infection strategy! By distorting the guanine crystals within their skin cells, the parasite transforms the appearance of a fish, making them much easier to see from above by predatory birds. Once the fish is eaten, the parasite reaches its final host, and can reproduce and start the cycle once more!

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James Billingham

Date: April 5, 2026