How do blue whales obtain food?

Its favorite food is "Krill". An Adult blue whale can kill upto 40 million krill per day. They can eat nearly 3500 kilograms of krill in a single day. They need nearly 1.5 million kilocalories of energy per day and so, they nearly eat nonstop. Small fish, crustaceans and squids too get caught when they trap krill in their mouth.

They scoop up large quantities of water into their mouth along with krill and other small aquatic creatures and then filters and push the water out. All remaining animals are swallowed.