Whale Shark Feeding (IMAGE) Smithsonian Tropical Research Institute Caption Whale sharks are filter feeders, eating plankton, fish eggs, krill, crab larvae as well as small squid and fish that enter their large mouths. They cannot digest plastic garbage. Credit Kevan Mantell Usage Restrictions Credit: Kevan Mantell License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.