From Zelda Wiki, the Zelda encyclopedia
A Water Dungeon may refer to any of the water themed dungeons of The Legend of Zelda series.
Often located in lakes and watery areas, these dungeons are among the most controversial, mostly because the difficulty is, more often than not, much higher than in other dungeons. Most water-based dungeons can only be conquered by manipulating or crossing liquid water in one way or another, which is considered by some players to be annoying. In the Water Temple, for example, Link has to make the water descend and ascend its level at least twice in order to meet the boss, and numerous times if the players guiding him overlook keys that may be needed later and that are only accessible when the water is on its right level; another difficulty is that Link has to constantly equip or de-equip his Iron Boots, depending on whether he is rising to a surface or walking on a bottom.
List of Water Dungeons