Narwhal
These unicorns of the sea live in some of Earth’s harshest environments. Narwhals use high-frequency clicks between 50-100 kHz to find their way under Arctic pack ice. Their echolocation proves critical during winter months when daylight disappears entirely. They detect small openings in the ice for breathing and locate shrimp and fish swimming below. They can find prey through tiny cracks, giving them access to food sources other animals can’t reach. This skill becomes a lifesaving advantage during brutal Arctic winters.