You would think the whale shark would eat big fish, right? The mammoth whale shark eats microscopic plankton that float in the open sea. They also eat krill and shrimp. It sometimes swimmis with it’s mouth open to filter. When filter feeding, they gulp in anything that the ocean carries in. It sucks water in large quantities. They also like to eat in warm places near the surface. They like being near the surface because it is warmer than the deep. They sometimes dive to get tiny squid, but more plankton is in the warmer areas. They are normally