Smaug is a fictional dragon from J.R.R. Tolkien's The Hobbit. He is known for his immense size, cunning intelligence, and greed, having hoarded a vast treasure within the Lonely Mountain. Smaug's character embodies the classic traits of a dragon, including a fiery breath and a fierce protectiveness over his gold. As the primary antagonist of the story, Smaug's interactions with Bilbo Baggins highlight themes of bravery and cunning. His eventual confrontation with the Dwarves and the impact of his actions on the surrounding world make him a memorable figure in Tolkien's legendarium.