Data Packs for Minecraft Java
Browse 186 free data packs for Minecraft Java — popular picks include Leviathan Ocean, Oceanographic, Piersprawl.
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Leviathan Ocean
Makes oceans absurdly deep. Inspired by Wifies' Leviathan ARG video.
Oceanographic
Towering islands and deep oceans

Piersprawl
Adds a village on the ocean
Aquatica - 0.1 Actual Fishing
This datapack aims to add to the aquatic regions of Minecraft. The 0.1 version overhauls the fishing system.
Craftable Vanilla Lights
A simple datapack that adds 4 new crafting recipes to the game : Ochre Froglight, Pearlescent Froglight, Verdant Froglight and (a better crafting recipe for) Sea Lantern.
[Aeronautics] Overworld End Sea
Enables Create Simulated/Aeronautics' End Sea mechanic in the overworld, for void-accessible worldgen
WORLD OCEAN
This datapack will generate a ocean only world. Play like a skyblock but in the middle of an infinite ocean.
Big Globe x Ben's Sharks
A datapack adding compatibility between the Big Globe and Ben's Sharks mods, making the mobs added by Ben's Sharks spawn in Big Globe worlds.
Balanced Craftable Heart of the Sea
A simple datapack that adds a challenging crafting recipe for the Heart of the Sea (requires a Nether Star) Intended for Skyblock, Superflat, Skyleaf Biomes and other limited overworld types.
EndlessOcean
Adds a customizable endless ocean after a certain distance from 0,0.
Unsafe Water
Now if you swim in river, sea or ocean you will take damage.
Mobs of Mythology Kobold Outpost (More integrated version)
A more integrated version of Kobold Outposts by Tierbee, with support for Quark and Upgrade Aquatic!
Nuclear sewage-核污水
This is a data pack that can be used for island survival, players will get poison and nausea when they touch water, and after drinking the water lung potion, they will be immune to poison and nausea, and of course, players can take a boat without harm!
Oceanvancements
This project adds a new advancements tab focused on ocean adventure and exploration.
Big Globe - Create: Molten Vents Compatibility
Adds compatibility between Create: Molten Vents and Big Globe by enabling aquatic vents to generate naturally in Big Globe oceans.
Oceanographic: Fractured
Oceanographic with aquifers enabled
Bonemeal Renewable Coral
Bonemealing coral blocks spreads them in a warm ocean.
Toasts Abilities
A data pack that adds 7 different custom classes, each with a ability, ultimate and a passive to improve combat. They are: Wind, Electric, Space, Sculk, Life, Metal and Oceanic
Elkonia Deep Coral Ocean Biome
An ocean world with one biome over the whole Overworld. No land, just water down to a coral seabed of mud, sand and gravel, with sulfur caves in the rock below it.
Calor
Calor is a worldgen datapack for Minecraft versions 1.21 and newer. It raises both the sea level and snow line.
Shark's Enchant Cap
Makes a Lower Max Level for Some Enchants, Aimed at Events
Nautlius Tweaks
this datapack tweaks the Nautilus by making them more resistant to trident damage and removing the underwater mining speed penalty
Stop Killing Turtles
This datapack makes it so there are SEVERE consequences for attacking sea turtles.
Mr. Burger's Mo'betta Overworld
Improves mountain peaks, ocean depth, and increases cave complexity down to -128 while maintaining the ambience of Vanilla worldgen.
Easier Sea Lanterns
Changes the current crafting recipe to a more balanced recipe.

Legacy Islands
Datapack that causes 1024x1024 "islands" of regular generation to be surrounded by forced deep oceans.
Bedrock Ranged Mobs (Datapack)
Makes Skeletons that are underwater and trident drowneds less than 3 blocks away from the player do melee instead of ranged attacks, like in bedrock edition
Water World FORK (thrite version)
Raised Sea Level: to Y=200 now Biome Adjustments: only Ocean now
Only Desert by KeyToFun
A datapack that turns the Minecraft world into an endless desert and badlands, with rare oceans and smoothed terrain.
Water World
raises oceans to y=120 in the overworld
Heartless
Removes the Heart of the Sea from buried treasure chests. No conduits for you!
easy CORAL FANS
Tired of searching for warm oceans? Craft all Coral Fans easily using wool and dyes!
Better Conduit Recipe
Adds a new recipe for the conduit, now requiring prismarine. The recipe will now require you to explore the ocean more, instead of just luck.
Sharkion
After getting caught in a terrible storm while out at sea as a young child a shiver of sharks find you and take you to their cave they raise you as a shark and you eventually mutate into a shark human hybrid a sharkion.
Better YUNG's Ocean Monument loot
Improves the loot found in YUNG's Better Ocean Monument chest.
Tidal Towns 9minecraft Data Pack (26.2) – Trade and Farm on Floating Ocean Towns
Tidal Towns 9minecraft Data Pack spawns floating settlements across deep ocean biomes. You find wooden houses, watchtowers, and farms connected by plank bridges right over the water. Villagers live in these towns and offer trades just like normal land villagers. The structures use vanilla blocks with weathered details to fit naturally into your world. Features: […]