In Blizzard's public 10.0 image, a walrus man rides a sea otter mount that has never been seen in the game, but its image has appeared in the player community.
The appearance of this sea otter mount is very similar to the winner of the 2017 Student Art Competition Character Art Group, and its author, Natha Nielsen, joined Blizzard in the second half of 2018 as a character painter.
It's unclear whether this Sea Otter mount is only available to NPCs or players. Note: The Student Art Competition is an art creation competition held by Blizzard for university students in the United States and Canada. The competition is divided into four categories: environment, character, special effects and action. The winner will not only receive a generous reward, but also have the opportunity to join Blizzard and turn their creations into reality.