Trivia

Hard

The White “Sugar Sand” Beaches Found In Tropical Locales Are Composed Of?

Fish Excrement
Powdered Quartz
Volcanic Residue
Ancient Calcium Deposits
Photo of a male parrotfish.
Philippe Bourjon/Wikimedia

Answer: Fish Excrement

If you’ve ever been to, or even seen photos of the beaches that line the coasts of equatorial nations and islands, then you likely noted how fine and pure white the sand is. It’s absolutely beautiful: green jungle foliage, crystal blue waters, and long stretches of brilliant white sand are a motif in vacation advertisements the world over for a good reason.

What you may not realize is that those beautiful “sugar sand” beaches are the result of the endless toil and food foraging habits of the parrotfish. Many species of parrotfish, such as the green humphead parrotfish, feed on the prolific amounts of algae and microorganisms found on coral reefs. In the process, their hard teeth grind away bits of the reef and tiny pieces of coral end up in the fish’s digestive system along with the food it was foraging for.

When the fish excretes the remains of the food, the ground up coral goes along with it and the end result is a surprisingly large transfer of coral reef to the ocean floor and beaches. A single parrotfish can produce 200 pounds (90 kilograms) of sand per year in this fashion. That glistening white beach is the result of thousands of years worth of parrotfish feasting on coral reefs.

While it might seem at first glance that the parrotfish would be harmful to the reef system, the amount of coral the fish chip away is negligible in comparison to the amount of coral they save by cleaning it of algae, sponges, and other organisms that would smother the reef.

Trivia

Hard

One Of The First CCTV Systems Was Installed To Observe?

Trivia

Very Hard

The Abbreviation For Laughter Used In Japanese Message Boards and Chat Rooms Is?

Trivia

Easy

The Men-Yoroi Was A Distinctive Piece Of Armor Worn Where?

Trivia

Hard

“Blood Rain”, Described By Multiple Accounts Throughout History Isn’t Tinted With Blood, But?

Trivia

Very Hard

Physical Features And Structures Shared Between Distantly Related Animals Are Examples Of?

Trivia

Hard

The Voice Of Sesame Street’s Bert, Grover, And Cookie Monster Also Voiced?

Trivia

Hard

What Is An Olympic Gold Medal Primarily Composed Of?

Trivia

Hard

In 1960s America, Players In Which Sport Were Radically Better Paid Than Football And Baseball Players?

Trivia

Hard

What Geeky Treat Outlasted The Show It Was Promoting By Over A Decade?