ModsFinder

Axolotl Sterilizer

by ЄУК

Axolotl Sterilizer lets server owners mark individual axolotls as sterile, so they can no longer breed.

FabricServer required, client optionalAll rights reserved1.21.11

What it does

Sterile status is stored on the axolotl itself and persists through bucket pick-up and release. Breeding with tropical fish is blocked for sterile axolotls, so the mark holds whenever the mob is moved.

Installation needs only the Fabric loader on the server. LuckPerms is supported for permission control, and when it is absent the command falls back to operator level 2. The mod is published for Fabric alone, with a single game version, 1.21.11, and the latest file, 2.2.1, dates from 2025-12-31. The code is All rights reserved, so the mod is not open source.

Key features

  1. Permanent sterile mark

    An axolotl can be marked sterile, and the mark stays with that mob until it is removed.

  2. Breeding blocked

    Sterile axolotls cannot breed, including when a player tries to feed them tropical fish.

  3. Status kept through bucket use

    The sterile status survives picking the axolotl up in a bucket and releasing it again.

  4. Permission fallback

    Commands use LuckPerms when it is present and otherwise require operator level 2.

Compatibility

Latest build for each game version and loader.

1.21.112.2.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Use cases

Controlling axolotl populations

Server owners who want a fixed number of axolotls in a world can stop breeding on the animals already placed.

Who it’s for: Server owners who manage axolotl numbers on a Fabric server running Minecraft 1.21.11.

How it compares

Full comparison

Breed Axolotl With Tropical Fish Item is a Fabric, Forge, NeoForge and Quilt mod for 1.20.1 – 26.2, server-side with an optional client, and open source under the MIT License. Bleu is server-side only, Fabric only, open source under the GNU General Public License v3.0 or later, and covers 1.21.2 – 1.21.11. Axolotl Sterilizer differs by being the only option here that marks individual axolotls as sterile.

ModLoadersGame versionsEnvironmentUpdated
Axolotl SterilizerFabric1.21.11Server required, client optional2025-12-31
Breed Axolotl With Tropical Fish Item [PurpurPack]Fabric, Forge, NeoForge and Quilt1.20.1 – 26.2Server required, client optional2026-06-24
BleuFabric1.21.2 – 1.21.11Server-side only2025-12-10

Questions

Does Axolotl Sterilizer need to be installed on the client?

No. The server requires it, and the client is optional, so players can join without installing anything.

Does the sterile status survive a bucket?

Yes. Picking up a sterile axolotl in a bucket and releasing it keeps the sterile status.

What permission is needed to run the sterilize command?

With LuckPerms present, the permission it provides applies. Without LuckPerms, operator level 2 is required.

In the catalog

Axolotl Sterilizer is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 19,862 mods support Minecraft 1.21.11.

Mobs mods11,058Fabric modsMods for 1.21.1119,862

Similar mods

[EMF] Entity Model Features1.18.2 – 26.3Animal Feeding Trough1.16.5 – 26.3Just Enough Breeding (JEBr)1.15.2 – 26.3TslatEntityStatus1.16.5 – 26.3Nyf's Spiders1.12.2 – 26.1Spawn Animations1.16 – 26.3

What the author says

AxolotlSterilizer is a server-side Fabric mod for Minecraft 1.21.11 that allows you to mark axolotls as sterile and permanently prevent them from breeding. AxolotlSterilizer — серверний Fabric-мод для Minecraft 1.21.11, який дозволяє “стерилізувати” аксолотлів і назавжди забороняє їм розмноження.
ЄУК, on the Modrinth page

Official listing

Owner
ЄУК
Published
2025-12-31
Updated on Modrinth
2025-12-31
Facts verified
2026-10-15

Tags

Game mechanicsMobsUtility
Open on ModrinthCompare