sentence: Scientists believe that it has something to do with the whale's echolocation system.
sentences_before: This melon holds oil, and the whale is able to change its shape.
sentences_after: They have one blowhole. Beluga means 'white one' in Russian. Unlike most other cetaceans, the beluga's seven neck vertebrae are not fused, giving it a flexible, well-defined neck.
concept_name: scientist
headings: Beluga whale Description
categories: Toothed whales