11452

Goldfish can see more colors than we can. Human eyes can see only three primary colors: red, blue and green. All other colors are mixtures of these. A goldfish, however, can see four, making it a tetrachromate. – WTF Fun Facts

Source: https://economictimes.indiatimes.com/magazines/panache/your-goldfishs-memory-lasts-longer-than-3-seconds-amp-other-facts-about-the-popular-pet/goldfish-see-more-colour-than-humans/slideshow/65604287.cms