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fapdos' Aquatic AdditionsMinecraft mod for 1.21.4

Adds many new fish creatures and underwater decorations to the game

client and servernewest supported 1.21.4AdventureMobsFoodWorldgen
Latest version
1.9.0
Loaders
Forge, NeoForge
Licence
LicenseRef-All-Rights-Reserved
Downloads
7.9k
Updated
8 mo ago
Available on
Modrinth
Space NodeOur hosting

Host fapdos' Aquatic Additions servers

One click and fapdos' Aquatic Additions is installed with the right loader, on hardware built for it.

  • 1.21.4
  • Forge
  • NeoForge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • 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 fapdos' Aquatic Additions declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.4Forge, NeoForge21+declared3 Dec 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023

Download

From fapdos' Aquatic Additions’s own host. Nothing is re-hosted here.

1.9.0release13 Feb 2026

faa-1.9.0.jar · 2.0 MB · for 1.20.1

Download latest
b338b6d3665c…
Older versions11
  • 1.8.025 Oct 20251.20.11.9 MB2.0k downloads815428be52d4…Get
  • 1.7.029 Aug 20251.21.41.9 MB144 downloads44220692de8c…Get
  • 1.6.217 Jul 20251.21.41.9 MB69 downloads613486507992…Get
  • 1.6.127 Jun 20251.21.41.9 MB49 downloadsaefe7a905227…Get
  • 1.6.030 Apr 20251.21.41.9 MB79 downloadsbf7511c89d6b…Get
  • 1.5.016 Jan 20251.20.11.9 MB3.3k downloads2a008dd73cd2…Get
  • 1.4.021 Dec 20241.20.11.8 MB220 downloads3437abac2c4d…Get
  • 1.3.01 Dec 20241.20.11.7 MB131 downloads5c0c88ab3e6f…Get
  • 1.2.027 Oct 20241.20.11.1 MB290 downloadsa5bb3f5f401b…Get
  • 1.1.08 Oct 20241.20.11.1 MB199 downloads366d43685c3a…Get
  • 1.0.013 Sept 20241.20.10.9 MB209 downloads7d7da4261b14…Get

Frequently asked

Does fapdos' Aquatic Additions work on Minecraft 1.21.4?

Yes. 1.21.4 is the newest Minecraft version fapdos' Aquatic Additions 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 fapdos' Aquatic Additions support?

Everything the author has declared, from 1.20.1 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install fapdos' Aquatic Additions on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does fapdos' Aquatic Additions support?

Forge, 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 fapdos' Aquatic Additions?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is fapdos' Aquatic Additions under?

LicenseRef-All-Rights-Reserved, 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 fapdos' Aquatic Additions?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod 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 fapdos' Aquatic Additions 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. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

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

Details from Modrinth, where the author last updated it on 13 Feb 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .