Food
Whale sharks are filter feeders, meaning they feed by filtering small organisms from the water. Their diet consists primarily of plankton, small fish, squid, and crustaceans. Whale sharks have large mouths up to 5 feet (1.5 meters) wide, allowing them to take in large amounts of water and filter out prey. They have over 3,000 tiny teeth, but these are not used for chewing; rather, they help hold prey in the mouth.
Water
Whale sharks can drink seawater, but they do not need to drink as much as other marine animals because they get a significant amount of water from the food they eat. They primarily obtain water through their diet of plankton and other small organisms, which contain a high amount of water.