How to Tame a Nautilus in Minecraft?

Why the phrasing is misleading: "nautilus" in Minecraft doesn't refer to a mob at all in most versions — it refers to the nautilus shell, a rare item dropped by drowned (zombie-like mobs that spawn underwater), used to craft a Conduit.

What a Conduit is, and why it's worth farming shells for: a Conduit is a block that, when placed in the centre of a structure built from prismarine and related blocks underwater, grants nearby players the Conduit Power effect — unlimited underwater breathing, night vision underwater, and faster mining underwater. It requires 8 nautilus shells plus a heart of the sea to craft.

How to get nautilus shells

• Kill drowned mobs. They have roughly a 3% chance to drop a shell on death (higher with Looting enchantment).
• Trade with wandering traders, who occasionally sell nautilus shells for emeralds.
• Fish for them. Nautilus shells can occasionally be caught as a "treasure" item while fishing.

Farming tip: building a drowned farm (a controlled spawning-and-killing setup near or over ocean water) is the most efficient way to collect the shells needed for a Conduit, since relying on random open-water encounters is slow.

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