ModsJava
Chest Cavity + Naturalist
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
This is a datapack that works with Chest Cavity and Naturalist, adding chest cavities to naturalist mobs, however not adding new organs. This datapack should work on other versions of the game (as the datapack was made for 1.20(.1)), but differences between the mods in 1.20(.1) and other versions of the mods would cause changes and possibly not everything working correctly.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20, 1.20.1
- 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 — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Ships as Chest Cavity + Naturalist.jar — drop this file into the mods folder
- Download size: 17 KB
- Download link checked 23 Aug 2026 — working
These come from our own check of the pack file, not from the source page.