Whale sharks may live for a century or more, giving the world's largest fish an unexpectedly long life span.

Today, International Whale Shark Day makes room for the world's largest fish. Despite their name, whale sharks are not whales but fish, reaching lengths of up to 18 metres and weighing around 18 metric tonnes. Found in warm tropical seas, they glide through the water with their mouths open, filtering plankton, fish eggs and other tiny prey. This species' distinctive white-spot patterns are unique to each individual, much like human fingerprints.

The image captures one of these giants in Cenderawasih Bay, West Papua, Indonesia, accompanied by a school of golden trevally. These bright fish often swim alongside whale sharks, taking advantage of food scraps and the protection offered by their enormous companion.

International Whale Shark Day highlights the challenges this endangered species faces, including bycatch, vessel strikes, habitat degradation and climate change. By raising awareness, the day encourages efforts to safeguard these peaceful ambassadors of the sea for generations to come.