Belugas. Adult beluga whales are easily distinguished by their often pure white skin, their small size and their lack of dorsal fin. Belugas have a broad, rounded head and a large forehead.Belugas are toothed whales. They have broad, paddle-like flippers and notched tails.They are known as sociable mammals that live, hunt and migrate together in pods, ranging from a few individuals to hundreds of whales. Belugas can produce a series of chirps, clicks, whistles and squeals, which give the beluga its other name, "the canary of the sea."