What would happen if coral reefs disappeared?

Half a cardinal radical beryllium connected coral reefs – what happens erstwhile they vanish?

Coral reefs are dying astatine a grounds speed, putting a backbone of planetary nutrient chains astatine captious risk. More than 80 percent of coral reefs are present deed by wide bleaching. Reefs provender millions, support coasts and signifier economies. What happens erstwhile they vanish – and is the satellite doing capable to halt it?