Needing between 150 to 300 pounds of food per day, captive killer whales are fed diets of fish. In the wild, killer whales may eat 375 pounds of food per day as they expend a lot more energy swimming around and hunting their food. The residents spend an average of 3-4 minutes per dive and the transients spend 5-15.
Also question is, how many krill do whales eat a day?
An adult blue whale can eat up to 40 million krill in a day. The whales always feed in the areas with the highest concentration of krill, sometimes eating up to 3,600 kilograms (7,900 lb) of krill in a single day. The daily energy requirement of an adult blue whale is in the region of 1.5 million kilocalories (6.3 GJ).
What the whales eat?
When eating plankton, whales can be seen skim-feeding with their upper jaws above the surface of the ocean. Gray whales eat very little while on migration. Still, they may find and eat schooling squid, krill, crab larvae, herring eggs, ghost shrimp, and small bait fish such as capelin.
How many calories does a whale need each day?
A typical whale weighs 50 tons and needs nearly 400,000 calories per day. A whale may spend 15 hours per day feeding during the summer season. 1. A blue whale is about 90,000 kg (198,000 lbs) and it eats about 4% of its body weight per day during the feeding season.