Coral reefs are cities within a liquid medium. They can harbor dozens of coral species which serve as the ‘high-rise’ condominium, serving as a home for a multitude of fish and invertebrates. This serves as a foundation(or food) for lager organisms to occupy this space. Coral reefs are important because it is estimated they are home to 1/3 of all fish species at one time during their life. The rapid rate at which coral species are being replaced by algae is alarming, and concerned the majority of coral reef scientist. The following photos showcase just a handful of organisms that call a coral reef home.