Mobs Mods for Minecraft Java
Browse 21 free Mobs mods for Minecraft Java — popular picks include Aquamirae, Fish of Thieves, Rainbow Reef.
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Aquamirae
Ship graveyard with terrible deep sea creatures!

Fish of Thieves
A mod adds all the fish from Sea of Thieves, fish fer ye pirate!

Rainbow Reef
Rainbow Reef is a mod that adds content to spruce up your in-game aquariums and coral reefs, including lots of new fish and sea creatures!
Mo' Creatures Extended
Continued maintenance for 1.12.2 – Adds several animals, monsters, aquatics and insects to the world of Minecraft!
Oceanic
Overhauls Minecrafts Oceans and Fishing!
Ocean Villager Trader
adds a new villager the Ocean Trader and his lighthouse structure
Aures - Sea Dwellers
Underwater villages and sea traders with random generation. Vanilla style.

Deep Waters
mermaids dimension
Mako Mermaids Mod
Live your H2O dream! Play as Cleo, Emma, Rikki or Mako characters, use elemental powers, and create your own story!

Pufferz
Want more aquatic animals & plants to fill your aquariums? Well then look no further!
Hybrid Aquatic: Fantastic Fishery
An addon for Hybrid Aquatic that adds various imaginary fish
UnderDasea
A mod that aims to add life to the oceans.
bigfish: ripple
Expand vanilla fishing with new fish, attributes, collection records, bounties, QTE fishing, cooking, placeable food, exploration tools, and progression-focused aquatic gameplay.
Aquatic Fauna Expansion
A NeoForge mod that revitalizes Minecraft's oceans with new creatures, behaviors, and underwater biodiversity.
Aquatic Plugin
This is a Minecraft Plugin wich adds many Ocean and Fish releated things to Minecraft

Water World - Atolls
Water World - Atolls is an immersive Minecraft mod (Fabric) that breathes life into ocean biomes by introducing procedurally generated Atoll structures, complete with custom villager AI behaviors, dynamic fishing, and unique blocks to ease water buildin
Azúl
An all-new dimension featuring a gigantic ocean surrounding it, and its magnificent fauna—or perhaps just a simple fauna mod?
Aquatic Creatures
Did you know we know most about the space than own ours oceans? I want to make you feel that with this mod
Subaquatic
Adds lots of ocean related things to 1.12.2! Including real ocean biomes, bug fixes, new mechanics, and more!
PetFish - New Dimension
Tame a big aquatic creature and discover new zones!!
Archosaur Survival
Archosaur Survival reimagines classic Minecraft by adding custom trees, animals, improved farming and cooking, and toggleable combat. Experience realistic ocean physics, dynamic weather with storms and tornadoes, custom furniture, and detailed blocks.