Card Trivia:Call of the Atlanteans
- "Poseidra, the Atlantean Dragon", "Atlantean Dragoons, and the shadows of multiple "Atlanteans" appear in this card's artwork.
- Somewhat ironically, "Atlantean Dragoons" cannot be Special Summoned by this card.
- This card is the first card to share its name with a Structure Deck set name:
海 皇 の咆 哮 (Kaiō no Hōkō Roar of the Sea Emperor). - If one looks closely enough, they will notice that "Poseidra" lacks the golden ring seen around his neck in his card artwork.