Huge coral reef discovered at Amazon river mouth

Huge coral reef discovered at Amazon river mouth

Scientists astonished to find 600-mile long reef under the muddy water in a site already marked for oil exploration 

Satellite view of the mouth of Amazon river and Brazil coast
Scientists were ‘flabbergasted’ to discover the Amazon reef as coral usually thrives in clear, sunlit tropical waters. Photograph: Modis/Nasa

The existence of the 600-mile long reef, which ranges from about 30-120m deep and stretches from French Guiana to Brazil’s Maranhão state, was not suspected because many of the world’s great rivers produce major gaps in reef systems where no corals grow.