Those animals are only members of the genus Balaenoptera furnished with dorsal fins, and like sperm whales, they're generally smaller than the bowhead whale.
One hypothesis states that bowheads might be singing so many songs because different populations are mixing together and bringing all their different songs to the mix.
Nelson Nungasat is captain of a whale hunting team. They rely on stable, thick ice to harpoon the 25 bowhead whales they're allowed to take each year for food.
Nelson Nungasat 是捕鲸队的队长。他们依靠稳定、厚实的冰来用鱼叉捕杀他们每年获准捕食的 25 鲸。