The Blue Whale is the largest animal ever known to have existed, growing up to 100 feet long and weighing as much as 200 tons. Despite its massive size, it sustains itself by feeding almost exclusively on tiny krill.

Blue Whales are known for their deep, resonant vocalizations, which can travel hundreds of miles underwater. These sounds are thought to help them communicate and navigate the vast oceans. Blue Whales are vital to marine ecosystems as they facilitate nutrient cycling.