Narwhals are a species of whale that is native to the Arctic waters of Greenland, Canada, Norway, and Russia. They are highly adapted to their cold environment and are not well-suited for life in aquariums.
Narwhals are also a highly social species and live in pods of up to 100 individuals. They are also very active swimmers and can travel long distances in search of food. These factors make it difficult to keep narwhals in captivity.