Did you know that blue whales favorite food is krill. Next, Krill are tiny little shrimp but different and lives in big groups called crustaceans. Krill can be found at the top of the water surface.Then, People think it’s a little weird that such a huge sea mammal would eat the smallest animal. After That, Do you want to know why blue whales eat krill it’s because blue whales are gargantuan.Last, A blue whale can eat up to 8,000 lbs of krill each day.