What is the largest species of shark?

The ocean's gentle giant, the whale shark, holds the impressive title as the largest species of shark and, in fact, the largest fish in the entire world. These magnificent creatures can reach astounding lengths, with some individuals reliably measured at over 60 feet long, making them longer than a school bus and heavier than a Tyrannosaurus Rex. Despite their intimidating size, these "whale" sharks are not whales at all, but rather cartilaginous fish, and they pose no threat to humans.

Unlike their more predatory shark relatives, whale sharks are docile filter feeders. They cruise through tropical and warm-temperate waters with their enormous mouths agape, sometimes reaching widths of over four feet, to strain vast quantities of plankton, krill, fish eggs, and small schooling fish from the water. Their specialized gill pads can process thousands of liters of water per hour, capturing tiny organisms for nourishment, while their thousands of tiny teeth play no role in eating.

These highly migratory animals are easily recognized by their distinctive dark grey skin adorned with a unique pattern of pale grey or white spots and stripes, which is individual to each shark, much like a human fingerprint. Whale sharks can live for many decades, with some estimates suggesting a lifespan of over 100 years. Unfortunately, despite their impressive size and gentle demeanor, whale sharks are currently listed as an endangered species, facing threats from fishing, boat strikes, and marine pollution.