Salmon (IMAGE)

WashU Medicine

Salmon

Caption

Salmon and other freshwater fish and amphibians supercharge their ability to see red and infrared light. Scientists at Washington University School of Medicine in St. Louis have shown that this evolutionary adaptation hinges on the activity of an enzyme that converts vitamin A1 to vitamin A2, enabling the aquatic creatures to more easily navigate murky waters.

Credit

National Park Service

Usage Restrictions

Credit to National Park Service

License

Licensed content

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