Biology
- Glaucus atlanticus is a shell-less marine gastropod mollusc in the family Glaucidae
- Glaucus marginatus is a shell-less marine gastropod mollusc in the family Glaucidae
- Pteraeolidia ianthina is a shell-less marine gastropod mollusc in the family Facelinidae
Media
- Blue Dragon is a collection of video games, manga, and anime. Blue Dragon (video game): A 2006 video game for the Xbox 360. Blue Dragon (manga): Also called Blue Dragon Ral Ω Grad, a manga based on the Blue Dragon video game series. Blue Dragon (TV series): An anime based on the Blue Dragon video game series.
- Blue Dragon: A novel in The Dark Heavens trilogy by Kylie Chan.
- The Blue Dragon: A Robert Strand Mystery: A novella by Ronald Tierney.
- The Blue Dragon: A novel by Robert Lepage, Marie Michaud, and Fred Jourdain.
- The Blue Dragon: A novel by Kirk Munroe.
- Blue Dragon: A tavern in Charles Dickens’ novel Martin Chuzzlewit.
- Blue dragon (Dungeons & Dragons): A type of dragon in the Dungeons & Dragons role-playing game.
- The Blue Dragon: A 1919 German silent film directed by Harry Piel.
- Blue Dragon Awards (disambiguation).
- Blue Dragon: A fictional character from Brave Animated Series by Yellow Book.
Sports
- Belgrade Blue Dragons, an American football club located in Belgrade, Serbia
- Cardiff City Blue Dragons, a former Rugby League team in Wales
- Hutchinson Blue Dragons, sports teams at Hutchinson Community College in Hutchinson, Kansas, U.S.
Other
- Azure Dragon, also called Blue Dragon (蒼龍 Cānglóng), is a powerful figure in Chinese religious beliefs, part of the group known as the Four Sea Dragon Kings.
- Blue Dragon is a nickname for the 2nd Marine Brigade in the Republic of Korea's Marine Corps.
- Odeleite River is a river located in Portugal.