02. Parrotfish Poop
What could be more romantic than walking hand-in-hand with your loved one over a gleaming, white, sandy beach? Maybe you lie in the sand and let it run through your fingers and muse on where so much beauty came from. Few people would imagine that all the dazzling sand around them is the product of fish poop. A single parrotfish can produce up to 360 kilograms (800 lb) of sand each year. Multiply that by thousands of fish and thousands of years, and you get those highly sought-after white beaches.