Forge Mods for Minecraft Java
Browse 91 free Forge mods for Minecraft Java — popular picks include YUNG's Better Caves (Forge/NeoForge), Ocean Floor - Clay Sand and Dirt, Underwater Village - Oceanic Structures.
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YUNG's Better Caves (Forge/NeoForge)
Overhauled cave generation, underground lakes and rivers, lava oceans, and more!
Ocean Floor - Clay Sand and Dirt
Spawns patches of Clay, Sand, and Dirt, within the Deep Dcean layer of boring gravel
Underwater Village - Oceanic Structures
Discover a lot of new oceanic structures!
Awesome Dungeon Ocean
This mod adds dungeons to your ocean, like boat, ruin..

Rainbow Reef
Rainbow Reef is a mod that adds content to spruce up your in-game aquariums and coral reefs, including lots of new fish and sea creatures!
Prehistoric Nature
Prehistoric plants, dinosaurs, animals, creatures, mobs, land and aquatic biomes and dimensions with many building blocks
Ocean World Dimension
Explore an endless ocean in the Deep Sea dimension!
Aquatic Additions
Aquatic Additions completes the vanilla turtle armor and adds an upgraded version to enhance underwater exploration
Mo' Creatures Extended
Continued maintenance for 1.12.2 – Adds several animals, monsters, aquatics and insects to the world of Minecraft!
Unnamed Sea
Additional structures for the sea and beach biomes, focusing on an immersive expansion for the vanilla game.
Panthalassa
Panthalassa adds prehistoric aquatic creatures to your world!
Aetherial Islands
Datapack that creates a whimsical floating islands world, with mountains, rivers, and floating ocean bowls!
Ocean Core
A mod that turns the world into a ocean with islands scattered about
One Survival Island
Datapack that creates a Single Survival Island in an Infinite Ocean World
Aquatic Craft
Passion project that adds an expansive, fleshed-out aquatic dimension.
Underwater Biome
New biomes in the ocean, new features and tech-tree!
Better Cave Worlds
Datapack that creates Cave Worlds, based on the old preset, featuring all biomes, ocean caves, and most structures.
Diving Bell for TFC
Introduces Items to dive for longer, encouraging underwater exploration.
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.
Wonderous Sea - Endless Ocean
Wonderous Sea adds new under represented marine life to the world of Minecraft!
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!
deep oceans
deep oceans is a mod that adds very deep oceans
One Piece World Like (Mine Piece Version)
Transforms Minecraft into a true One Piece-inspired world with custom oceans, islands, conquest systems, and Grand Line exploration for the Mine Piece mod.
Sea Creeps
Sea Creeps have swam into Modrinth! The ocean just got explosive...
Aures - Sea Dwellers
Underwater villages and sea traders with random generation. Vanilla style.
Atlantis
This mod adds an ocean dimension to Minecraft with colored seashell, translucent colored pearls, shipwreck with treasure chest full of gold and aquamarine ore, and more.
Dorsal Moon
An add-on for Enhanced Celestials, adding a Moon that aids in ocean exploration for the night.
Geographicraft
Climate control allows you control climate zones, ocean sizes, biome frequencies, and continent sizes. Make Minecraft worlds into Yourcraft worlds!
Oceanfront
Adds vanilla styled content to minecraft's beaches
Cannibal Villages: Tropical Exploration
Adds procedural cannibal villages, sharks, marine wildlife, tropical resources, mermaids and dangerous coastal adventures.
Scuba Diving Suit
Scuba Gear adds a functional diving suit designed for underwater exploration, explore the ocean with confort in a vanilla way.
Ocean Ores
Why not mine in the sea?
Repurposed Structures - Better Ocean Monuments Compat Port
TelepathicGrunt’s Repurposed Structures - Better Ocean Monuments Compat Datapack ported to Forge, NeoForge, Fabric and Quilt!

Pufferz
Want more aquatic animals & plants to fill your aquariums? Well then look no further!
ArPhEx_DeepestDepths
An addon for the ArPhEx mod, adding in several aquatic features.