Narwhals are medium-sized marine mammals found primarily in the Arctic waters. They are known for their long, spiral tusk, which is actually an elongated tooth that can grow up to 10 feet long. Narwhals typically have a mottled gray or black skin and can weigh between 1,500 to 3,500 pounds. They are social animals, often found in groups called pods. These creatures primarily feed on fish, squid, and shrimp, using their echolocation abilities to locate prey in deep waters. Narwhals are also known for their unique vocalizations, which help them communicate with each other. Their habitat is threatened by climate change and human activities, making conservation efforts important for their survival.