Underwater view of the reef along the circumference of the Great Blue Hole on Lighthouse Reef, UNESCO, Belize

coral marine life biodiversity underwater reef lighthouse ecosystems colorful thriving snorkeling diving fish sea anemones turquoise ocean nature habitat ecosystem reefs aquatic tropical blue colors garden natural beauty turtles algae shells seagrass world exploration conservation adventure clear water vivid creatures structure scenery geological formation sunlight depth belize formations scenic tourism