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[[File:OceanField-EN-Anime-DM.png|thumb|right|The Ocean terrain]]
The '''Ocean''' field was shown briefly in [[Duelist Kingdom]], used by [[Mako Tsunami]]. It powered up [[WATER]] monstersas well as hiding them under the water. Other monsters could not occupy it.
In early video games the field can be changed to Ocean, by activating "[[Umi]]", which granted the [[ATK]] and [[DEF]] changing effects of "[[Umi]]" to the affected area.
[[Category:Terrains]]
