A Water Deck is a deck type based around WATER Attribute monsters. While some choose to build their decks around certain cards (i.e. A Legendary Ocean, Superancient Deepsea King Coelacanth, Sea Lancer), and others around certain archetypes (i.e. Atlantean, Gishki, Mermail), most can benefit from usual WATER support cards, specially Salvage and Spiritual Water Art - Aoi.