All clownfish are born male, and the most dominant male in a community changes its sex to female and mates with the next-most-dominant male. Source: National Geographic

The Amazon Rainforest has been described as the "Lungs of our Planet" because it provides the essential environmental world service of continuously recycling carbon dioxide into oxygen. More than 20 percent of the world oxygen is produced in the Amazon Rainforest.

Source: http://www.deforestationintheamazon.wordpress.com

Octopi (or octopuses for those that prefer) have sharp beaks, much like a parrot. No, I’m not lying. Check it on Wikipedia.