This refers to a specific archetype of cards within the Yu-Gi-Oh! Trading Card Game. These cards are characterized by their association with aquatic environments and warrior-like figures, often depicting female combatants. As an example, one might encounter cards with effects that trigger upon being sent to the graveyard or those that provide support to other water-attribute monsters.
These themed cards offer a distinct play style for duelists, emphasizing strategic resource management and synergy between cards within the archetype. The introduction of this theme provided players with new deck-building opportunities and expanded the tactical depth of the game. Furthermore, the unique design and artwork contribute to the overall aesthetic appeal and collectibility of the Yu-Gi-Oh! card pool.