What are the Beluga Whales up to now at the Georgia Aquarium? Find out here! The Ocean Voyager: a Big Exhibit for Some Really Big Fish! Rather than a dorsal fin, which would be prone to injury from ice and heat loss, a beluga has a dorsal ridge.The beluga’s brain lacks an olfactory system (sense of smell).Blubber accounts for 40-50% of the beluga’s weight.A beluga’s skin is ten times thicker than dolphin skin and one hundred times thicker than terrestrial mammal skin.
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