Minecraft Wiki:Drafts/Breath of the Nautilus

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Breath of the Nautilus is a status effect added in Mounts of Mayhem. It only activates when a player mounts a nautilus or zombie nautilus, which freezes the oxygen bar, preventing a player from drowning.

Immune mobs[]

The following mobs are immune to "Breath of the Nautilus":

Icon	Advancement	In-game description	Parent	Actual requirements (if different)	Resource location
	How Did We Get Here?	Have every effect applied at the same time	A Furious Cocktail	Have all of these 34 status effects applied to the player at the same time: Absorption Bad Omen Blindness Breath of the Nautilus Conduit Power Darkness Dolphin's Grace Fire Resistance Glowing Haste Hero of the Village Hunger Infested Invisibility Jump Boost Levitation Mining Fatigue Nausea Night Vision Oozing Poison Raid Omen Regeneration Resistance Slow Falling Slowness Speed Strength Trial Omen Water Breathing Weakness Weaving Wither Wind Charged The source of the effects is irrelevant for the purposes of this advancement. Other status effects may be applied to the player, but are ignored for this advancement. This is a hidden advancement, meaning that it can be viewed by the player only after completing it, regardless of if its child advancement(s), if any, have been completed.	`nether/all_effects`

Java Edition
September 27, 2025		The "Breath of the Nautilus" effect are announced at Minecraft Live - September 2025.
1.21.11	25w41a	Added "Breath of the Nautilus" effect.
Bedrock Edition
1.21.130	beta 1.21.130.20	Added "Breath of the Nautilus" effect.
1.21.130	beta 1.21.130.27	No longer stops air from replenishing when: on solid ground when a Water Breathing-inflicted player rides a nautilus when submerged in lava.

Issues relating to "Breath of the Nautilus" are maintained on the bug tracker. Report issues there.