Swimming With the Giants, Whale Sharks of Darwin Island

Whale sharks are the largest species of fish on the planet. They are among the largest animals to have ever lived. Only blue whales, sperm whales, and humpback whales (all mammals) are larger. The largest ever recorded was 18.8m (almost 62 feet) long. The only fish that has ever lived that was larger than a whale shark is the now extinct megalodon.
Whale sharks have enormous mouths with no teeth. They feed by filtering fish eggs, krill, and small fish, trapping them in baleen plates (comb-like structures) as whales do. They swim with open mouths, eating enormous amounts of tiny creatures daily.