ROYGBIV

One of the things that immediately stood out to me while diving in Indonesia was the sheer scale of the coral reefs. Instead of small patches of reef scattered across the seafloor, entire coral walls rise from the depths, completely covered in both hard and soft corals. Every surface seems alive, layered with color, texture, and movement. Indonesia sits at the center of the Coral Triangle, the most biodiverse marine region on Earth. Warm tropical water, steady currents, and nutrient-rich conditions allow these reefs to thrive. The currents constantly bring fresh water and nutrients across the reef, helping corals grow and supporting an incredible amount of marine life. Coral reefs like these are often called the rainforests of the ocean. Even though reefs cover less than one percent of the ocean floor, they support nearly a quarter of all marine species. Schools of fish, tiny invertebrates, sharks, turtles, and countless other animals depend on these structures for food, shelter, and protection. Diving along these coral walls feels less like visiting a reef and more like floating through a living city — one that has been growing quietly beneath the surface for thousands of years.