Structure Deck: Roar of the Sea Emperor is a Structure Deck in the Yu-Gi-Oh! Official Card Game (OCG). It is the twenty-third deck in the OCG's Structure Deck series (thirty-first including the Character Structure Decks), following Structure Deck: Dragonic Legion. The TCG equivalent of this deck is Realm of the Sea Emperor Structure Deck.
Each Structure Deck: Roar of the Sea Emperor contains:
- 1 Preconstructed Deck of 40 cards
- 1 Rulebook
- 1 Playing Guide
- 1 Playmat
- Yu-Gi-Oh! OCG Deck Page 遊戯王ゼアル OCG STRUCTURE DECK - 海皇の咆哮 - (Japanese)