The blue whale is the largest mammal in the world, and its massive tongue can weigh as much as an elephant, or 15,000 pounds, according to National Geographic. The tongue is an important muscle used in the whale's unique feeding routine.
As the whale weighs 200 tons, it's not surprising that the abundantly strong tongue weighs in at such a massive weight. Much like others in its species, the blue whale feeds by straining its food through baleen, or overlapping plates in its mouth. The tongue is an important element in this process as the whale sucks in water and fish, before the tongue helps expel the water through the baleen, leaving behind thousands of small fish for the whale to digest.