Fabric Mods for Minecraft 1.21
Browse 188 free Fabric mods for Minecraft 1.21 — popular picks include Illager Viking Longship, Tidal, Animal Garden - Harp Seal.
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Illager Viking Longship
Adds an Illager Viking Longship to cold ocean biomes.
Tidal
Adds ambient tidal waves to beaches and oceans!
Animal Garden - Harp Seal
This mod adds the harp seal as tamable mob to the frozen ocean biome!
Animal Garden - Narwhal
This mod adds the unicorns of the sea, the narwhals to the frozen ocean biomes.
Big Globe - YUNG's Better Ocean Monuments Compatibility
Data pack to generate YUNG's Better Ocean Monuments in a Big Globe world.
Sea Life
Bring oceans and rivers to life with new fish, items, and underwater machinery.
Unstable SMP Simulator
Pre-configured Unstable SMP battle simulator modpack. Includes: Final Law Battle, 2v1000 Law Battle, Great Sea Law Battle, Tournament, Cindercrest Battle, Lakerek VS Wemmbu, Law End Island Defense, Mist, Smuggler Path Law Fight, Underworld
Better Cave Worlds
Datapack that creates Cave Worlds, based on the old preset, featuring all biomes, ocean caves, and most structures.
Luminous Blocks
Luminous glass that emit light, perfect for underwater builds and for enhanced building aesthetics.
Sea Weapons
A mod that adds new sea themed weapons to minecraft!
Revamped Floating Islands
Datapack that creates Floating Island worlds based on the old preset, with all biomes and structures. Additionally featuring floating oceans and rivers.
No More Ocean Monuments
Removes ocean monuments from the world generation.
Skeleton Ghost Ship
Adds a skeleton crewed ghost ship that spawns in ocean biomes
Unseaworthy
A mod that makes boats unsuitable for ocean voyages.
Villager Rafts
Adds stranded Villagers drifting across the oceans on wooden rafts.
100 Days on a Desert Island
Survive 100 days in Hardcore on a tiny island with minimal resources and endless ocean
Ocean's Delight Reforged
Ocean's Delight is an addon mod for Farmer's Delight based around adding culinary content to the ocean!
Illager Battleship
Adds an illager battleship to Ocean Biomes
Deeper Oceans: Refabricated
Continuation of Apollo's Deeper Oceans mod for Fabric. Oceans 3x as deep as vanilla, with adjusted Ocean Monument placement.
Temperature Bands
Modifies world generation to place biomes into repeating temperature bands. Compatible with most worldgen mods. Now with humidity based on proximity to river and/or ocean too!
Liquid Fog Begone
A simple mod that allows you to control how dense the fog is while underwater or in lava.
Wild Animals
This datapack adds elephants, jellyfishes, sharks and more, without causing lag to the server! No resource pack required
Ocean's Delight (Polymer Port)
Polymer Port of Ocean's Delight
Ocean Mermaid Statue
Adds a large underwater Ocean Mermaid Statue with drowned and hidden treasure
Sunken Warrior Statue
Adds a Sunken Warrior Statue to the ocean floor
Space's Sponge Crafting Recipe
Adds a vanilla-friendly, ocean-themed crafting recipe for the uncraftable Sponge block.
Lost Ocean Whale
Adds a lost whale to all ocean biomes

Pickles to Skellys
Client-side Fabric mod for Donut SMP that disguises sea pickles as skeleton spawners and iron chestplates as elytras.
Impenduits
Adds weak forcefields powered by Hearts of the Sea
Villager Viking Ship
Adds 3 new villager viking ships to warm ocean biomes
Abandoned Rig
An ocean-themed apocalyptic survival modpack.
Boatism
Add new and fully customizable Boat Engines to Minecraft. Traveling by sea will never be the same again!
Oceanic Weaponry
This mod adds a few weapons themed around the ocean
craftable Sponge Tweak
Allows players to craft sponges instead of only finding them in ocean monuments. Mod
Better Oceans and deserts
Generates aquatic structures to liven up oceans.
DeepSea
Changes boat navigation on ocean regions