Poo makes good beaches

Parrotfish feed on algae that they get by biting coral, like this stoplight parrotfish (Sparisoma viride) in the intial phase of its coloring. The parrotfish has specialized grinders in its throat to separate the algae from the coral's hard skeleton. After enjoying the algae, the parrotfish excretes the ground coral as (yep, you guessed it) sand.

The next time you sun on the beaches of Akumal or any other along the coast, be thankful for parrotfish poo.

Thanks to Djaba for posting the photo on the forum of Locogringo.com. (Click on the photo to get a better view of its teeth.)