Shoal of Cleaner Wrasse (Labroides dimidiatus) being hunted by Coral Grouper (Cephalopholis miniata) on Fragile Coral Reef Ecosystem Ocean Environment. The location is Hin Daeng Dive Site, Andaman Sea, Krabi, Thailand. - stock video

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 shallow coral reef consisting mainly of hard corals supporting shoals of Cleaner Wrasse (Labroides dimidiatus) being hunted by Coral Grouper (Cephalopholis miniata). Its corals although on the whole healthy, are showing signs of distress. 75% of the worlds coral reefs are now classed as 'Threatened,' with 60% of most reefs having local damage from anchors, overfishing, coral bleaching, disease and pollution.