The world’s largest coral, bigger than a blue whale and more than 300 years old, has been discovered by National Geographic Society’s Pristine Seas team in the Pacific near the Solomon Islands. The Pavona clavus hard coral, or shoulder-blade coral, measures 112 feet by 105 feet and is visible from space. It was discovered when the Argo research vessel team deployed a deep-sea camera on the last night before leaving the area. The coral colony is mostly brown with patches of yellow, red, pink, and blue, and consists of almost a billion genetically identical coral polyps working as one organism. Despite its age, it is in excellent health but researchers worry about the effects climate change and overfishing may have on it.