Currents in the ocean are like rivers flowing through the sea. Where currents sweep past a reef wall, they bring tiny creatures called plankton that fish love to eat. Blue Corner sits right in the path of one of these powerful currents, which is why so many animals gather there — it is like a huge underwater restaurant.
Divers who visit Blue Corner hold onto the reef with a special hook so the current does not carry them away, and then they simply watch. Schools of barracuda spin in silver spirals. Grey reef sharks cruise past like slow aeroplanes. Giant trevally dart through the water at high speed. Napoleon fish — with their big bumpy heads — peer curiously at the visitors.
Even looking at Blue Corner from the water's surface is breathtaking, because the water is so clear you can see the reef colours far below. The coral here is so healthy and alive that scientists study it to understand how reefs can stay strong. Palauans were among the first people in the world to create a marine sanctuary to protect places like this.