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Minecraft Java 1.21 Mods

Browse 750 free mods for Minecraft Java 1.21 — popular picks include Sea of Steves, Space's Sponge Crafting Recipe, Oceanic sword remastered.

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Sea of Steves
1.20.5

Sea of Steves

Boat battle plugin for Minecraft servers

1.0kdownloads
Space's Sponge Crafting Recipe
1.21

Space's Sponge Crafting Recipe

Adds a vanilla-friendly, ocean-themed crafting recipe for the uncraftable Sponge block.

999downloads
Oceanic sword remastered
1.21.8fabric

Oceanic sword remastered

Adds a mythical pirate blade to your world allowing you to harness the power of the seas.

998downloads
Biome Compatibility Patch
1.20.1

Biome Compatibility Patch

Renames content to preserve compatibility between the 4 major biome mods as well as Terralith, Environmental, Atmospheric, Autumnity, Upgrade Aquatic, Wetland Whimsy, and Jaden's Nether Expansion.

963downloads
Their Name Is Blåhaj
1.18.2

Their Name Is Blåhaj

Renames the Blåhaj mod's Soft Toy Shark to Blåhaj

918downloads
RC GameShark (Cobblemon)
1.21.1fabric

RC GameShark (Cobblemon)

RC GameShark is a client-side tracking mod for Cobblemon that helps you locate and hunt specific Pokémon more efficiently. It scans nearby spawns and provides real-time visual and audio cues to guide you directly to them.

902downloads
One Island
1.21.9fabric

One Island

Start alone on a small island in an endless ocean. Gather resources, build, explore, and survive with what the sea provides.

890downloads
Soggy Cat Compasses and Clock
22w11a

Soggy Cat Compasses and Clock

Turns the default Minecraft compasses and clock into Shark (soggycat)

833downloads
Puris Eco Ocean
1.21.1neoforge

Puris Eco Ocean

This is a passion project from zi_jian. It adds 10 brand-new ocean biomes, 29 new entities, along with corresponding items, materials and decorative blocks. I'm still a beginner mod developer, so feel free to report any bugs you encounter.

832downloads
Waterbed
1.21.1fabric

Waterbed

Introduces a bed that lets you sleep underwater

817downloads
Better Turtle Helmets
1.21fabric

Better Turtle Helmets

Reworks the turtle helmet to provide continous water breathing underwater at the cost of losing durablility overtime.

817downloads
better mob : sea expansion
1.21.1neoforge

better mob : sea expansion

Better Mob: Sea Expansion transforms Minecraft oceans with unique creatures like Whales, Lobsters, Deep Watchers, Coral Golems, and Jellyfish, creating deeper exploration, dangerous encounters, and unforgettable underwater adventures.

810downloads
oceans biomes
1.21fabric

oceans biomes

Create worlds made entirely of oceans with a simple configuration screen. Choose the ocean biome, tweak depth, and enable or disable islands and ocean structures.

805downloads
Warm Ocean Only World (No Sea Structures)
1.21

Warm Ocean Only World (No Sea Structures)

Turns the Overworld into an infinite warm ocean with no islands or sea structures!

800downloads
Blåhaj Lite
1.21.1neoforge

Blåhaj Lite

Blåhaj Neoforge port, Remove Pride Sharks

766downloads
Sea Bunny´s
1.21.1neoforge

Sea Bunny´s

Adds Adorable Sea Bunny´s to Minecraft ❤️

766downloads
Waterlogged Beds
1.16.3fabric

Waterlogged Beds

Allow beds to be waterlogged for more immersive underwater builds

761downloads
Redstone Underwater
1.21.11fabric

Redstone Underwater

Redstone can now be waterlogged!

755downloads
Exodus 14:27
1.21.11fabric

Exodus 14:27

Fixes MC-278019 bug to restore sea level in superflat worlds.

731downloads
Sea-Through Boats
1.19.3

Sea-Through Boats

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.

726downloads
Aqua Forge
1.21.11

Aqua Forge

This is a data pack that will generate an ocean biomes only world.

705downloads
Secret Rooms
1.21spigot

Secret Rooms

Secret buildings with rare loot underground, underwater, and in the End

695downloads
Sea of Bombs
1.21.1neoforge

Sea of Bombs

Adds the Fire, & Blast Bombs and the Bone Caller from Sea of Thieves

694downloads
Remove water droplets
1.21

Remove water droplets

Does what it says. Removes all of those pesky water droplets in underwater bases.

689downloads
No Sprint-Swimming
1.21.2

No Sprint-Swimming

Disables fast movement in the water in survival and on servers, making oceans daunting again

685downloads
fishies in the sea
1.21.1neoforge

fishies in the sea

modpack centered around building with some adventure aspects

669downloads
Raft World
1.21.1neoforge

Raft World

Start on a tiny raft in an endless ocean. Survive and rebuild the world.

657downloads
Primordial Sea
1.17.1

Primordial Sea

Fishing Resource Pack

639downloads
Water Depth Fog
1.21.1neoforge

Water Depth Fog

Underwater fog gets darker and closer the deeper you dive — a purely visual atmosphere mod for deep-ocean gameplay. Client-side.

636downloads
Aquarius Trilogy
1.21.5

Aquarius Trilogy

Add a new aquatic dimension featuring some refreshing biomes and structures

634downloads
Seagrass Overgrowth
1.21.11

Seagrass Overgrowth

Seagrass Overgrowth brings the ocean to life by replacing plain seagrass with overgrown aquatic remnants.

629downloads
Better Sea Lantern Crafting
1.21.6

Better Sea Lantern Crafting

This datapack/mod allows you to craft Sea Lanterns in a better way

629downloads
Gura Totem
1.20.2

Gura Totem

Totem of Gura A playful and mischievous shark spirit, this totem embodies curiosity, agility, and oceanic charm.

623downloads
Hammerheads
1.20.1

Hammerheads

Replaces dolphins with sharks

623downloads
Simple Mermaid Tails
1.21.8fabric

Simple Mermaid Tails

This Mod adds Mermaid Tails, thats it. This is kinda a fork from my Mako Mermaids Mod but without the Powers etc.

622downloads
Sharky's Additions
1.20

Sharky's Additions

Large Collection of Resource Packs and Nice Aesthetic Changes

621downloads