Explaining The Ocean on Instagram: "The whale shark is the largest fish in the world, yet it’s often called a “gentle giant” of the oceans. Despite growing up to 40 feet long, these massive filter-feeders survive mainly on plankton, small fish, and krill, swimming with their huge mouths open to sieve food from the water. Their spotted skin patterns are unique to each individual, like fingerprints, making them easy to identify in the wild. Whale sharks are found in warm, tropical seas across the