Parrotfish poop makes up the majority of sand grains found on white sand beaches

Parrotfish live on a diet of coral. As you can imagine, this could do a real number on their little teeth, but new research has revealed how these sea creatures evolved to avoid breaking their chompers every time they chow down. As a result, parrotfish teeth are some of the stiffest, hardest, and most abrasion- and fracture-resistant gnashers found on the planet.

Arguably, one of the best parts about visiting a beach is digging your toes in the sand, but have you ever wondered where all these grains came from? Turns out, the majority of sand grains found on white sand beaches, such as those found in Hawaii, are actually parrotfish poop. The parrotfish eat coral, and when the coral comes out the other end, we get smooth white grains of sand.

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