Aquatic

This feature is exclusive to Java Edition.

Many aquatic mobs seen in the Update Aquatic artwork.

The term Aquatic refers to an in-game group of mobs that live in oceans and rivers and are able to swim.

Classification

They take extra damage from tridents enchanted with Impaling,‌‌^{[until JE Edition Combat Tests]} and, except axolotl, do not cause pufferfish to inflate nor take damage from them. All aquatic mobs except dolphins are immune to drowning, and all except guardians, elder guardians, and turtles take suffocation damage if out of water for too long. Aquatic mobs have the ability to swim, whereas other mobs simply float on water or sink. In Bedrock Edition there is no in-game classification for these mobs.

List of mobs

Name	Behavior	Notes
Axolotl	Passive	Axolotls are salamanders that can be found in Lush Caves.
Cod	Passive	Cods are a common fish found in oceans.
Dolphin	Neutral	Dolphins are neutral animals that live in non-frozen oceans.
Elder Guardian	Hostile	Elder Guardians are mini-bosses found in Ocean Monument, they are the biggest aquatic mob.
Glow Squid	Passive	Glow squids are variant of squids found in ocean depths, ravines and underground lakes.
Guardian	Hostile	Guardians are pufferfish-like monsters that spawn in and around ocean monuments.
Pufferfish	Passive	Pufferfish is a fish found in oceans that defend themselves by dealing damage and inflicting poison.
Salmon	Passive	Salmon are common passive mobs found in oceans and rivers.
Squid	Passive	Squids are common ink-squirting mollusks found in oceans and rivers.
Tropical Fish	Passive	Tropical Fish are common mobs that have 2,700 naturally occurring variants.
Turtle	Passive	Turtles are friendly reptiles that lay eggs on beaches.

Trivia

File:Drowned in a river.jpeg

A drowned swimming in a river.

Despite Drowneds being a underwater variant of Zombies, they are not considered aquatic mobs, but undead.
Corals and sea pickles instantly die if they get out of water for too long similar to the the aquatic mobs.