Elkonia Wiki
🐠 Datapack 1.21.10

Deep Coral Ocean

A single-biome spawn hub that turns the entire overworld into an endless deep coral ocean — teeming reefs, kelp forests, and sunken ruins in every direction. No mods required.

Download 📦 Modrinth ↗ GitHub Repo

01Overview

What Deep Coral Ocean does.

Deep Coral Ocean replaces the vanilla overworld generator with a single custom biome — a deep, teeming coral sea that stretches to the horizon in every direction. It's built as a spawn hub / ocean world: drop it into a fresh world and you spawn straight into the reef. Everything runs on a datapack, so it works on vanilla clients and servers — no mods.

Vanilla-friendly

No mods

Pure datapack. Add it to a new world and the overworld becomes the deep coral ocean.

Single biome

Endless reef

One curated deep-coral biome everywhere — perfect for an aquatic spawn/lobby or an ocean survival run.

Open source

On GitHub

Source is public at Elkidogz/Deep-Coral-Ocean.

02Getting Started

Because it replaces the overworld, use a fresh world.

  1. Use a new world. The pack overrides the overworld generator, which is baked at world creation — put the datapack in your world's datapacks folder (or your server's) before first load.
  2. Create / load the world — the whole overworld generates as the deep coral ocean, and you spawn into it.
  3. Explore the reefs, kelp forests, and sunken ruins. Bring a way to breathe. 🫧

Requires Minecraft 1.21.10. No mods, no loaders — a pure vanilla datapack.

03Features

What you'll find beneath the waves.

Deep Coral Reefs

A curated coral biome — coral trees, claws, mushrooms, and gardens filling the seascape.

Kelp Forests & Seagrass

Dense kelp forests and seagrass beds sway across the seabed.

Living Seabed

Mud, sand, gravel, and dirt seabed shaped up to about Y-25, with undersea cave carving below.

Boosted Sea Life

More fish and dolphins, plus glow squid lighting the depths.

Sunken Structures

Ocean monuments, warm & cold ocean ruins, and shipwrecks to discover.

Sponges

Reef Details

Wet-sponge pockets and other reef touches scattered through the coral.

04Changelog

Version history.

V22 — Minecraft 1.21.10

  • Seabed of mud / sand / gravel / dirt shaped up to ~Y-25.
  • Kelp forests kept; boosted fish & dolphins; glow squid added.
  • Coral reefs, seagrass beds, and wet-sponge pockets across the biome.
  • Ocean monuments, ocean ruins (warm & cold), and shipwrecks enabled.