This mod adds Subnautica's “Reaper Leviathan” to Minecraft's deep oceans. A giant intimidating sea creature that terrorizes the deep oceans!
Minecraft's oceans are still very peaceful and easy, so why not make things more interesting by putting a giant sea creature in them? The Reaper Leviathan mod adds the iconic creature from “Subnautica” to Minecraft's deep oceans, to make aquatic exploration more challenging! Just like the Warden in Minecraft, (and the Reaper in Subnautica) the Leviathan is a dangerous obstacle in your Adventure to be faced with caution, making exploration in the game less monotonous and exciting!
(The Leviathan can be found in the deep oceans of Minecraft)
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.4
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as the_reaper_leviathan-1.0.0-neoforge-1.21.4.jar — drop this file into the mods folder
- Download size: 783 KB
- Download link checked 7 Sept 2026 — working
These come from our own check of the pack file, not from the source page.