The Great Barrier Reef is undergoing a major coral bleaching event for the second year in a row. | National Geographic

33K views · 830 reactions | Hiding 視 Small fishes exhibit a remarkable behavior of seeking refuge within coral reefs for protection. When snorkelling or diving, always look carefully between the corals, as there's plenty of life here that you may not even notice if you rush by.  www.instagram.com/underwater_images | Master Reef Guides | Facebook

25K views · 289 reactions |  Diving Florida’s Reef – The World’s 3rd Largest 錄️ Florida is home to the third-largest coral reef system in the world, stretching over 350 miles along the coast. With BLU3 Nomad and Nomad Mini, boaters and divers can explore this incredible underwater ecosystem up close. From vibrant marine life to crystal-clear waters, there’s no better place to dive. Who’s ready to explore? | BLU3 | Facebook

4.1M views · 360 reactions | Immerse yourself in BBC Earth's amazing 360° video of a coral reef. Can you spot the turtles?  #OurBluePlanet | BBC | Facebook