The Blubberwing is mentioned dragon. They are only mentioned at the beginning of the Friendly Inter-Tribal Swimming Race when it is said that Vikings use their fat to protect themselves from the icy cold waters of the sea.
- "Don't be a softy!" roared Gobber. "The Blubberwing fat you have rubbed all over you SHOULD keep you warm enough to prevent actual DEATH ... but its all part of the game of course."
- ―Gobber the Belch
Specifically, Gobber the Belch is referring to the young Hooligan contenders of the Inter-Tribal Swimming Race. Later, Dogsbreath the Duhbrain dumps a "pot of slimy green Blubberwing goo" all over Fishlegs.
No description or information is given about the Blubberwing, though it might be inferred from its name that it is rather . . . blubbery.