The document discusses the beluga whale, including its taxonomic classification as Delphinapterus leucas. Belugas live in Arctic and subarctic waters around the northern hemisphere, preferring habitats with icebergs and floes with temperatures around 0 degrees Celsius. They are carnivorous, eating squid, fish, and other creatures. Belugas have distinctive physical features like seven flexible neck vertebrae and short flippers that allow them to navigate through ice. They are closely related to narwhals and fish like sailfish.