Minecraft Java 1.21 Mods
Browse 750 free mods for Minecraft Java 1.21 — popular picks include Oceanic Weaponry, Sea-Through Boat, The Fog Origin.
Updated daily
Oceanic Weaponry
This mod adds a few weapons themed around the ocean
Sea-Through Boat
Explore the depths like never before with this crystal-clear glass-bottom boat resource pack. See underwater wonders as you glide across the ocean, bringing new life and clarity to your Minecraft adventures.
The Fog Origin
This datapack adds a new origin to the Origins mod, The Fog. Using this origin, you can fly through the sky and swim through the sea as a ball of gas, or temporarily solidify to hang out with friends!
[World Generator] Ocean Only Water World!
A world with endless oceans and small settlements only. Like in the movie Waterworld.

Fish Fix
Amends hardcoded sea level assumptions to fix aquatic mob spawning.
Atlantis: Fire Beneath Water
Classic underwater survival challenge map, now upgraded to Datapack | 经典水下生存地图数据包重制版《亚特兰蒂斯:水寒火暖》
小鲨鱼pvp材质包Sharky PvP Texture Pack
实用简约的pvp起床战争材质包,持续更新中——小鲨鱼工作室出品 A practical and minimalist PvP Bed Wars resource pack with low on fire, continuously updated — produced by sharky workshop
TigerShark
磁场转动是漫画《海虎》和《武神》系列中的一种超能力,属于宇宙本源之力,是宇宙中必不可少的力量 Magnetic field rotation is a superpower in the manga series "Sea Tiger" and "God of War", belonging to the primordial force of the universe and an indispensable force in the universe.
craftable Sponge Tweak
Allows players to craft sponges instead of only finding them in ocean monuments. Mod
The Red Sea Tools
Change your vanilla tool to be cooler and better
Create: Warnautics
Create Big Cannons add-on with redstone-launched aerial bombs, multi-bomb cassettes, sea bombs, land mines, cinematic blast effects, and optional Sable ship destruction.
Better Oceans and deserts
Generates aquatic structures to liven up oceans.
Chromakey Blocks
A resource pack for adding chromakey blocks in Minecraft! This makes it easy to take out the background from screenshots or videos like a greenscreen. This changes glowstone to green, sea lanterns to blue, and shroomlights to red.
Unlocked Void Sea - Aeronautics Addon
A simple utility mod that lets you use the "End Sea" physics from Create: Aeronautics in other dimensions. Extremely configurable.
DeepSea
Changes boat navigation on ocean regions
Accurate Salmon Variation
Salmon spawned oceans will use the a salmon texture that reflects real life salmon in oceans, while river salmon use their vanilla texture
Gigantic Squid
This datapack adds a new 3D animated ocean boss, the gigantic squid! No resource pack required!
Deep Ocean Panorama
A custom main-menu panorama depicting the deep ocean
Deep Blue
Adds 10 majestic ocean creatures — whales, sharks, giant squid, and more — along with 15 new items including weapons, food, and crafting materials to bring the deep seas to life.
Kislevemon
This is a Cobblemon addon which comes with currently 19 fakemons, Shiny and non shiny! they can be found in the oceans, deserts and forests.
Total Light✨
This texture pack boosts the game’s overall lighting, letting you see clearly 💧 underwater, ⛏️ in caves, and 🌙 during the night
Jeff The Land Shark v.1 [Cobblemon 1.7]
Mrr! Adds Jeff the Land Shark from Marvel Rivals to Cobblemon.
craftable Sponge
Allows players to craft sponges instead of only finding them in ocean monuments.
Over the Sea | Underwater Adventures!
Facing new aquatic dangers in a world made up entirely of water and small islands floating on it.
Create Simulated: End Sea Everywhere
Bare bones datapack that adds the End Sea from create simulated to other dimensions. Useful for Skyblock style modpacks.
Aquatic Torches for Fabric 1.21.1
Waterloggable glow squid torches for Tricky Trials.
Blue Depths
This is a datapack that improves the Minecraft ocean and river ecosystem by adding new mobs, blocks, and a brand new ocean boss. The new sea creatures include Orcas, Sharks, Sturgeons, Jellyfish, Catfish, and Tuna
Sea Blue Sky Overlay
A fabricskybox sky overlay of a beautiful blue sky over an ocean.
Colorful Lights
Changes Shroomlights, Redstone Lamps, Glowstone, Sea Lantern colors (Please see files for other colors)
Scuba Diving Suit
Scuba Gear adds a functional diving suit designed for underwater exploration, explore the ocean with confort in a vanilla way.
Hana's Plushies
Adds craftable and rare loot plush shark items. 16 for each of the colors and several pride ones.
MxSxC1 No Particles
This removes the following particles: Buff Effects Rain Splashes Underwater Bubbles
Water World (Only Ocean)
Removes all land above sea level leaving only ocean.
More Tide Fish
Added some dangerous deep ocean fish to Tide⚡️

Maddy's Origins
A comprehensive rework of Origins, replacing the stock origins with 9* new, varied origins. Become a featherweight Avian, a semi-aquatic Amphibian, a durable Construct, a nimble Critter, and more!
OceanBlock - Skyblock Reinvented
Skyblock, but in the ocean