1. The Beluga whale is a relatively small toothed whale that is brown-gray at birth and bright white in adulthood

2. They were originally identified as Gray's beaked whale, but later genetic analysis revealed that they represented the first complete specimens of the spade-toothed whale.

3. Stejneger's Beaked whales, sometimes known as the "Bering Sea Beaked whale" or "saber-toothed whale," are little known members of the Beaked whale family (Ziphiidae).

4. Beluga, (Delphinapterus leucas), also called white whale and belukha, a small, toothed whale found mainly in the coastal waters of the Arctic Ocean and adjacent seas but also in rivers and deep offshore waters