Blue whales have strong muscles surrounding their breathing holes to prevent water from entering and filling their lungs. As much as 90% of the oxygen they inhale is absorbed, compared to 15% in humans. In this video, you can observe the breathing action

Blue whales have strong muscles surrounding their breathing holes to prevent water from entering and filling their lungs. As much as 90% of the oxygen they inhale is absorbed, compared to 15% in humans. In this video, you can observe the breathing action