How Does a Blue Whale Feed?

Massive blue whales feed on very tiny prey called krill. How do they manage to get enough to eat? Hint: it involves literally doubling in size! In Part Three of our four-part Giants of the Sea series, we’ll hitch a ride on the back of a blue whale to learn about its incredible feeding mechanism. In only 3-5 million years (a short time on the geological scale), blue whales evolved from dolphin-sized ancestors. Scientists think their size and filter-feeding mechanism evolved to help them take advantage of changes that were happening in the oceans. These researchers are using advanced sensor tech to help them understand how blue whales engulf their prey.