News Animals Baleen whales eat (and poop) a lot more than we realized In a single day, a blue whale can gulp down the caloric equivalent of 30,000 Big Macs Humpback whales feed on sand launce fish in the Stellwagen Bank National Marine Sanctuary off the coast of Massachusetts. New research suggests that baleen whales, including humpbacks, eat a lot more food than scientists realized. Elliott Hazen Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Jonathan Lambert November 3, 2021 at 12:00 pm Whalers have plucked giant whales from the sea for much of the last century, reducing their numbers by up to 99 percent for certain species.