National Geographic:

When you weigh 200 tons, even the smallest body movements require a lot of energy. That’s why blue whales, Earth’s largest animal, are picky eaters.

Stunning new drone footage shows exactly how these massive mammals maneuver to feed on only the most nutritious patches of krill—providing insight on how they make these choices.

Fascinating that the blue whale is, possibly by necessity, picky about the size of krill patch it eats.