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{{about|the ''OCG '' [[Structure Deck]]|the ''TCG [['' Structure Deck]]|[[Structure Deck: ''Realm of the Sea Emperor]]Structure Deck''}} 

| image = SD23-DeckJP.jpgpng

| ja_name = ストラクチャーデッキ －{{Ruby|ＳＴＲＵＣＴＵＲＥ ＤＥＣＫ海|かい}}{{Ruby|皇|おう}}の{{Ruby|咆|ほう}}{{Ruby|哮|ストラクチャーデッキこう}} —海皇の咆哮—－| romaji_name = Sutorakuchā Dekki - Kaiō no Hōkō -| tc_name = 基本組 海皇咆哮 改版 STRUCTURE DECK| ja_trans_name pinyin_name = Structure Deck: Roar of the Sea Emperor| ko_name = {{Ruby|ＳＴＲＵＣＴＵＲＥ ＤＥＣＫ|스트럭처 덱|lang=ko}} —해황의 포효—| ko_rr_name = Seuteuleogcheo Deg - Haehwang-ui Pohyo -

| cover_card = [[Poseidra, the Atlantean Dragon Poseidra]]

| ja_release_date jp_release_date = June 16, 2012| ko_release_date tc_release_date = July 4, 2015| kr_release_date = September 4, 2012

| prev = ''[[Structure Deck: Dragonic Legion|Dragonic Legion]]''| curr = ''Roar of the Sea Emperor''| next = ''[[Structure Deck: Assault Onslaught of the Fire Kings|Onslaught of the Flaming KingFire Kings]]''

'''''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 fifth -first including the Character Structure Decks), following ''[[Structure Deck: Dragonic Legion]]''. The ''[[TCG]] '' equivalent of this deck is ''[[Structure Deck: Realm of the Sea EmperorStructure Deck]]''.

{{Main|Set Card Ratios: Structure Deck: Roar of the Sea Emperor (OCG)}} Each ''Structure Deck: Roar of the Sea Emperor'' contains :* 1 Preconstructed Deck of 40 cards in total. The number of card of each rarity are as follows:  ** 1 [[Ultra Rare]]** 2 [[Super Rare]]s** 37 [[Common]]s* 1 Rulebook* 1 Playing Guide* 1 [[Playmat]]

SD23-DeckJP.jpg png | Japanese<br />''{{Ruby[[Set Card Galleries:Structure Deck: Roar of the Sea Emperor (OCG-JP)|ＳＴＲＵＣＴＵＲＥ ＤＥＣＫUnlimited Edition]]SD23-DeckKR.png |ストラクチャーデッキ}} —海皇の咆哮—''Korean<br />[[Set Card Galleries: Structure Deck: Roar of the Sea Emperor (OCG-JPKR-1E)|1st Edition]]SD23-DeckTC.png | Traditional Chinese<br />[[Set Card Galleries:Structure Deck: Roar of the Sea Emperor (OCG-TC)|Unlimited Edition]]SD23-Poster-TC.png | Traditional Chinese promotional poster

| ratios lists = OCGJP,KR,TC| lists 1e_galleries = JPKR| ue_galleries = JP,TC

{{Set list tabs|JP,KR,TC}}

{{OCGDecks}}

* [http://shriek.twoday.net/stories/75237736/]* [http://www.yugioh-card.com/japan/lineup/zexal/sd_kaioh_no_houkou/ Yu-Gi-Oh! OCG Deck Page] 遊戯王ゼアル OCG STRUCTURE DECK - 海皇の咆哮 -{{Icon|ja}}