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One of the few whale species with unfused cervical neck vertebrae is the beluga.
![beluga](https://assets.shortpedia.com/ there was an error uploading your file.uploads/2023/01/10/1673345804.jpg?tr=w-1200,h-600,cm-pad_resize,bg-F3F3F3)
One of the few whale species with unfused cervical neck vertebrae is the beluga. They have highly flexible necks as a result of this, and their heads may move in all directions.