Beluga whales are medium-sized marine mammals known for their distinctive white color and rounded forehead. They are often found in Arctic and sub-Arctic waters, where they inhabit shallow coastal areas and rivers. Belugas are social animals, often living in groups called pods, and are known for their vocalizations, which have earned them the nickname "canaries of the sea." These whales can grow up to 18 feet long and weigh as much as 3,500 pounds. Belugas primarily feed on fish, crustaceans, and other marine organisms. They are also known for their ability to adapt to changing environments, making them a fascinating subject of study in marine biology.