UnderDasea

UnderDasea

A mod that aims to add life to the oceans.

by
2.4K Downloads
forgeadventuremobsworldgen
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Screenshots

A lonely piranha...
The jungle swamp
The Great Thunder Ocean
The Deep Dark Ocean
The Deep Dark Ocean
The thunder ocean

About this Mod

UnderDaSea is a mod aiming to upgrade the existing oceans and more by adding more progression for the player as well as new mobs and biodiversity. 

[ COMPATIBLE WITH ENCHANTMENT DESCRIPTION AND JUST ENOUGH EFFECT DESCRIPTIONS ]
YOU NEED TO INSTALL GECKOLIB AND JEI IS HIGHLY ADVISED

[ IN 2 LANGUAGES: FRENCH AND ENGLISH ]

It adds 4 new biomes. 

The Jungle Swamp

 The Jungle Swamp is a mix of the swamp and jungle biome. Two specifics mobs spawn there: The pirhana and the firefly. 

The Jungle Swamp

The Deep Dark Ocean

The Deep Dark Ocean is a variation of the ocean but darker, more gloomy. In this ocean full of sculk like blocks, you will find an horrifying creature named the Sea Lamp Fish. However, this biome keep some good treasures. Who knows, maybe the lampfish keep the key to this treasure ?

The deep dark ocean

The Dead Ocean

The Dead Ocean is not somewhere you want to swim. Dead plants, toxic creatures, dangerous blocks. Who knows what happened here? There's even that little fella named the Red Fish with its cute 3 eyes... How cute!

Just a thing... You might explode!
The thunder ocean

The Thunder Ocean

The most dangerous biome of the mod. In this biome, cursed with lightening, you can get strike by any minutes. While you need to take precautions, you will find some cool oil rigs like structures and very cool stuff in it. In this biome, lightening can be a good material. In addition, these lightening could give you a curse, or a benediction... 

(Note: This is a pre-alpha version, in the release, there are not that many towers in the biome)

It adds also new underwater creatures such as jellyfishes in 3 different sizes, sword fishes, piranhas, red fishes, ray manta, blob fishes, eels and more to come. 

New mobs

It adds new biodiversity such as sea orchins, starfishes, new underwater plants...

5 new discs. 

The Fish Net.

The fish net is a net you put underwater. It catches fish, trash and even treasures! You can upgrade your net with some upgrades such as the Lapis-Lazuli Upgrade, the Gold Upgrade, the Diamond and more.

You can also upgrade the fish net with a block of netherite. You can fish faster, more fishes with more upgrades.

New underwater nature such as: starfishes, orchins, corals.

Overall of some vanilla mechanics:

      --- The Elder Guardian:

The elder guardian now drops a heart, usable to craft some epic items! 

The elder guardian has now 2 phases. When entering the second phase, at 25% of its lives, it will summon lot of guardians to protect itself.

     --- The beaches

Did the beaches seemed empty? Welcome the palm trees, snake burrows and the beach rocks!

     --- Squid Tentacles

Yummy squid can now be eaten.

Not convinced yet?

Download the mod and test it for youself :)

Available Versions

UnderDasea 1.2.3release
MC 1.20.1forge
January 25, 2025
UnderDasea 1.2.2release
MC 1.20.1forge
November 18, 2024
UnderDasea 1.2.1release
MC 1.20.1forge
November 10, 2024
UnderDasea 1.2.0release
MC 1.20.1forge
October 23, 2024
UnderDasea 1.1.1release
MC 1.20.1forge
June 10, 2024

How to Install UnderDasea on Your Server

1

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.20.1).

3

Install Mod

Open the mod browser in the dashboard and search for "UnderDasea". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forge

Minecraft Versions

1.20.1, 1.19.4

Server-side

Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

UnderDasea server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.

Is UnderDasea compatible with forge?

UnderDasea officially supports forge for Minecraft 1.20.1, 1.19.4. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with UnderDasea – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if UnderDasea consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install UnderDasea with just one click on your server.

Recommended RAM
6 GBab €12/mo
Min. 4 GB | +1 GB pro 5 Spieler
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1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
LicenseRef-All-Rights-Reserved
Server-side
Required

Supported Versions

1.20.11.19.4