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modpack

🪼 JellyfishMinecraft modpack for 1.21.11

Optimization and Enhancement combined with speed and ease of use

client onlynewest supported 1.21.11OptimizationLightweightMultiplayer
Latest version
4.2.0-fabric_sodium
Minecraft
1.21 to 1.21.11
Java
Java 21+
Loaders
Fabric, Quilt, NeoForge
Licence
MIT
Downloads
997
Updated
6 mo ago
Available on
Modrinth
Space NodePartner

Host 🪼 Jellyfish servers

One click and 🪼 Jellyfish is installed with the right loader, on hardware built for it.

  • 1.21.11
  • Fabric
  • Quilt
  • NeoForge
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version 🪼 Jellyfish declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric, Quilt, NeoForge21+declared9 Dec 2025
1.21.5Fabric, NeoForge, Quilt21+declared25 Mar 2025
1.21.1Fabric, NeoForge, Quilt21+declared8 Aug 2024
1.21Fabric, Quilt, NeoForge21+declared13 Jun 2024

Download

From 🪼 Jellyfish’s own host. Nothing is re-hosted here.

4.2.0-fabric_sodiumrelease4 Feb 2026

Jellyfish 1.21.11 Fabric-RLS.mrpack · 2.4 MB · for 1.21.11

Download latest
54dd78e6f1c2…
Older versions15
  • 3.0.0-rethinked24 May 20251.21.50.4 MB71 downloads266ce3dfe62a…Get
  • 2.1.3-fabric_vulkan21 Dec 20241.21.10.1 MB53 downloadsbe4d771b5162…Get
  • 2.1.3-neo_sodium21 Dec 20241.21.121.9 MB53 downloadsa9073d15eaa7…Get
  • 2.1.3-quilt_sodium21 Dec 20241.21.10.1 MB41 downloadsa19c4687d022…Get
  • 2.1.3-fabric_sodium21 Dec 20241.21.10.1 MB37 downloadsf57f093bba23…Get
  • 2.1.2-neo20 Dec 20241.21.121.9 MB43 downloads4e6af3368b5b…Get
  • 2.1.2-quilt20 Dec 20241.21.10.8 MB32 downloads6cc5878303c3…Get
  • 2.1.2-fabric20 Dec 20241.21.10.8 MB33 downloads301e58aa4b69…Get
  • 2.1.120 Dec 20241.21.10.1 MB47 downloads01891c67b3bd…Get
  • 1.1.227 Aug 20241.210.8 MB99 downloads236adb89d797…Get
  • 1.1.127 Aug 20241.210.8 MB80 downloads28ad021c8cec…Get
  • 1.1.027 Aug 20241.210.8 MB86 downloads308b3f7c8f00…Get
  • 1.1.0-a227 Aug 20241.210.7 MB64 downloads60072b583fd3…Get
  • 1.0.125 Aug 20241.210.8 MB84 downloads843313d85c4b…Get
  • 1.0.024 Aug 20241.210.8 MB93 downloads50b3997e32b6…Get

Frequently asked

Does 🪼 Jellyfish work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version 🪼 Jellyfish declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does 🪼 Jellyfish support?

Everything the author has declared, from 1.21 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install 🪼 Jellyfish on the client or the server?

The client only. There is nothing to install on the server, so it works on any server you can already join.

Which loader does 🪼 Jellyfish need?

Fabric, Quilt, NeoForge. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for 🪼 Jellyfish?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the modpack itself.

What licence is 🪼 Jellyfish under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install 🪼 Jellyfish?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the modpack and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download 🪼 Jellyfish safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)PacktrixPre-packed Official Modpack containing Patrix Resource Pack for easy install using Fabric/Quilt.Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.Photon OptimizationMinecraft optimization framework prioritizing performance, simplicity, and compatibility. 1.7.10-26.1.2 across Fabric, Forge, NeoForge, and Quilt!ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 Snapshot 5 ✔fps+pvpFPS + PvP Boost is a lightweight Minecraft modpack designed to maximize performance and give players a competitive edge in PvP. With FPS-boosting optimizations and combat-focused tweaks, it delivers smoother gameplay, better responsiveness, and enhanced vi

Last checked 6 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

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