Water

Water is an abundant blue liquid. It is found in nearly any biome in pools of various sizes, and forms the large Oceans on either side of a map. It is less abundant in Deserts, and absent in The Underworld (where it disappears if made to flow there). Water flows more freely than lava. Each biome has its own unique water color (these colors can be changed in the late-game, when Water Fountains become available). Water is only found above a certain depth, beneath which Lava pools tend to appear instead.

Candles, Torches, and Flaming Arrows do not emit light underwater, but Glowsticks and some other light sources do. Most torches are knocked free when water touches them.

Upon submersion, a player's breath meter will display, indicating their remaining breathing time before drowning damage will be incurred. The point where a player is considered submerged for purposes of the breath meter is one pixel above the eyes.

If the player's feet are in at least one tile of water, movement is hindered noticeably. Certain accessories or potions can boost player movement through liquids, enable swimming, or even allow walking along its surface. Players cannot swim by default.

Items interacting with water

 * Flippers allow the player to swim upward by jumping repeatedly from any point within the water.
 * Gills Potion allows the player to breathe underwater.
 * Breathing Reed allows the player to breathe while in shallow water and also increases the breath meter.
 * Diving Helmet increases the breath meter.
 * Diving Gear increases breath meter and allows swimming.
 * Neptune's Shell allows the player to breathe underwater and allows swimming.
 * Water Walking Potion, Lava Waders, Obsidian Water Walking Boots and Water Walking Boots allow the player to walk on the surface of water.
 * Pumps and Buckets can move water.
 * Flipper Potion and Fishron Wings allow the player to move at normal speed in water.
 * Jellyfish Necklace, Jellyfish Diving Gear, and Arctic Diving Gear emit light when in water.

Colliding liquids
These blocks are created when water meets other liquids.