Males belugas can range between 12 to 18 feet in length and weigh anywhere between 2,300 to 3,500 pounds where as females are somewhat smaller, ranging in a length of around only 10-13 feet and weighing between 1,500 to 2,600 pounds.
Although calvare usually born a darker shade of gray by the time they reach maturity they have an all white body which is but one of the unique characteristics that separate beluga whales from other cetaceans. For instance, unlike many whales and dolphins, the beluga does not have a dorsal fin but instead has merely a small fin ridge.
And unlike many other whales or dolphins, belugas have much greater range of lateral movement, being able to move their heads side to side because the vertebrae in their necks are separated much like it is in human beings instead of being fused together as is the case with most cetaceans Also unlike most other whales and dolphins, beluga whales can actually swim backwards.