Menu

modpack

🪼 JellyfishMinecraft modpack for 1.21.11

Optimization and Enhancement combined with speed and ease of use

client onlynewest supported release 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
9 mo ago
Available on
Modrinth

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.

Most recently published release

4.2.0-fabric_sodiumrelease4 Feb 2026

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

Download this release
54dd78e6f1c2…
Older versions15
  • 3.0.0-rethinked24 May 20251.21.50.4 MB71 downloads266ce3dfe62a…Get
  • 2.1.3-fabric_vulkan21 Dec 20241.21.164 KB53 downloadsbe4d771b5162…Get
  • 2.1.3-neo_sodium21 Dec 20241.21.121.9 MB53 downloadsa9073d15eaa7…Get
  • 2.1.3-quilt_sodium21 Dec 20241.21.185 KB41 downloadsa19c4687d022…Get
  • 2.1.3-fabric_sodium21 Dec 20241.21.185 KB37 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 20241.21.162 KB47 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 side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does 🪼 Jellyfish support?

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

Which Java version do I need for 🪼 Jellyfish?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

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?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download 🪼 Jellyfish safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

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.FPS+ PvP Boost | Ultimate FPS & Combat Client [ Every Version ]Ultra-lightweight FPS boost & PvP modpack for Fabric. Boost FPS on low-end PCs with Sodium optimizations, lower input lag, cleaner visuals, and combat HUD tweaks built for Hypixel Bedwars, Duels, PotPvP & CPVP. Maximize frames and dominate fights.香草精华 Vanilla EssenceFaithful to the origional. Better vanilla experience without any new blocks or mobsElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 ✔

Details from Modrinth, where the author last updated it on 4 Feb 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .