Coral reefs are the one of earths most complex ecosystems, containing over 800 species of corals and one million animal and plant species. Here we see a Giant Clam (Tridacna gigas). These clams are a rare site due to overfishing for their meat and pearls they are a ‘Vulnerable species’. Their shells are open by day to allow sunlight to feed the algae within via photosynthesis. Vitality | Environment | Nature | Social Issues | Travel Destinations

High Resolution JPEG Picture of Coral reefs are the one of earths most complex ecosystems, containing over 800 species of corals and one million animal and plant species. Here we see a Giant Clam (Tridacna gigas). These clams are a rare site due to overfishing for their meat and pearls they are a ‘Vulnerable species’. Their shells are open by day to allow sunlight to feed the algae within via photosynthesis. [1181624719] stock photo