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Minecraft Java 1.21 Mods

Browse 750 free mods for Minecraft Java 1.21 — popular picks include Lava Gen Tweaks, Breathe Underwater, Calm Columns.

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750 mods

1.21neoforge

Lava Gen Tweaks

Tweak the base sea level for lava! Typically starts at -54.

211downloads

1.21.1fabric

Breathe Underwater

A simple mod to let you breath under water without any potion effect Theres many dangers already, dont let the sea be other

208downloads

1.21

Calm Columns

Tired of bubble columns cluttering your view? This pack tones down their visual intensity, making them far less intrusive while preserving their function and style. Perfect for underwater bases, mob farms, or any build where bubble spam gets in the way.

207downloads

1.21.1fabric

Stay Flooded!

A mod that prevents air pockets from forming when submerged blocks are destroyed, perfect for an aquatic playthrough :-)

205downloads

1.21.1neoforge

Harpooned

Shoot Harpoon on underwater as wind!

204downloads

1.21.11

Experiency Bosses

Experiency Bosses is a datapack that brings forth four legendary foes, each bearing unique treasures—from the Axolotl lurking in the ocean’s depths to the Wither Skeleton King, crowned in shadow.

198downloads

1.21.1fabric

oceanmammam

Oceanmammam is the server version of Oceanmanman. Inspired by NIKO YAPS' Modpack. Full credit to Mod devs

189downloads

1.21.9

Visible sea lantern animation

resource pack that make the sea lantern animation more visible

185downloads

1.21.1fabric

DrownForReal

Drown For Real adds realistic player panic animations when your underwater oxygen bar hits zero. Built for Fabric, it features custom flailing animations that smoothly blend in and out over a fraction of a second using player-animation-lib.

184downloads

1.21.1neoforge

Nauseous Lite

Enchanced and customized nausea effects

179downloads

1.21.4

Bouquet³: Corrupted Shorks

A resourcepack that replaces Guardians with Corrupted Sharks at 50% chance.

177downloads

1.21.6

Piersprawl

Adds a village on the ocean

170downloads

1.21.1fabric

Toads Simple Origins: Fish Bowl

Adds a custom piece of armor that allows custom origins datapacks to add a way to spend more time on land or in the nether without completely removing the challenge of only breathing underwater.

168downloads

1.21.1neoforge

Eternal Ocean

An ocean world with creatable ships along with many new fishes and other creatures. Swimming and fishing are overhauled, along with plenty of new structures and biomes to explore.

168downloads

1.21

Oceanographic

Towering islands and deep oceans

166downloads

1.21.5

Aquatica - 0.1 Actual Fishing

This datapack aims to add to the aquatic regions of Minecraft. The 0.1 version overhauls the fishing system.

165downloads

1.21fabric

No Boats

This mod removes all boats from Minecraft, forcing you to travel across water the slow way. It makes oceans feel bigger and exploration harder since you can’t just zip across huge distances anymore.

162downloads

1.21.4fabric

Underwater Torch

Place all torches underwater and they will still emit light Full Fabric 1.20.1 + 1.21.1 + 1.21.4

155downloads

1.21.3

Sky Lantern

Sea Lantern? I only know Sky Lantern

151downloads

1.21

TurtleSMP (Custom Gems & SMP Abilities)

Official TurtleSMP plugin introducing elemental custom gems, pyromancy, ocean shields, and stasis abilities for Paper 1.21.1.

150downloads

1.21.4

FrostPack

Oceany Pack. With a Blue Style and a stroke of white on the ui

147downloads

1.13

Totem of undying Shirahoshi

Pixel Art Totem of Undying inspired by Princess Shirahoshi Grace of the deep ocean. This Shirahoshi totem shimmers with mermaid elegance, coral hues, and a smile that can calm any storm.

146downloads

1.21.3

FishMating

Bring your underwater world to life by letting fish breed naturally when players throw seeds into water! 🌊🐠✨

144downloads

1.21.1neoforge

Oceancraft - Seafaring & Tech

A big ocean modpack centered around Create and the Ocean.

139downloads

1.21.1fabric

Aqua Verse

AquaVerse expands aquatic biodiversity of minecraft

133downloads

1.21.8

DrownedOverhaul – A Deep Sea Threat Awaits

DrownedOverhaul transforms Minecraft’s oceans into a place of genuine peril. This plugin completely reimagines the behavior of Drowned mobs, turning them from passive nuisances into coordinated threats lurking beneath the waves.

130downloads