UnderDasea
by leolerenardo
UnderDasea adds underwater creatures, plants and a fishing net to Forge worlds, and turns some ocean and swamp areas into new biomes.
What it does
The mod targets existing oceans and adds more life to them, with new underwater creatures such as jellyfish in three sizes, swordfish, piranhas, rays, manta rays, blobfish and eels, plus starfish, sea urchins, corals and new underwater plants. Two mobs can spawn in each of several areas, including a piranha and a firefly. Some biomes are dangerous: a dead ocean, areas where toxic plants and creatures appear, and a cursed biome where lightning strikes at intervals. The lightning biome also yields a material useful for crafting, and the mod adds structures such as oil rigs for exploration.
A fishing net can be placed underwater to catch fish, trash and treasures. It can be upgraded with Lapis-Lazuli, Gold and Diamond upgrades, and a netherite upgrade, with faster catches and more species at higher tiers. The mod also mixes swamp and jungle into a single biome and includes a small red fish with three eyes. Text is available in French and English. The mod requires Geckolib and works with Just Enough Items (JEI) for recipe lookups. It is published for Forge and is not open source, and it is released under All rights reserved. Client and server both need the mod.
Key features
Underwater creatures
Jellyfish in three sizes, swordfish, piranhas, rays, manta rays, blobfish and eels join the ocean fauna.
Oceanic plants and life
Starfish, sea urchins, corals and new underwater plants add biodiversity to the seabed.
Fishing net upgrades
A net placed underwater catches fish, trash and treasures, and its upgrades raise speed and species range.
Dangerous biomes
A dead ocean, toxic plants and a lightning-struck biome offer hazards and a crafting material.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 1
Use cases
Ocean exploration
Players who swim far from shore can find oil rigs, towers and creatures that are absent from vanilla oceans.
Who it’s for: Players who want more marine life and fishing progression in survival worlds, and server owners who add ocean content for multiplayer.
How it compares
Ocean World is a Forge mod for 1.18.2 – 1.20.1, released under All rights reserved and not open source, and it runs on client and server. Tax' Ocean Villager is a Forge mod for 1.20.1 under the MIT License, also run on client and server, and it is not open source. Oceanic is a Fabric, Forge and Quilt mod for 1.19.4 – 1.20.1 that is server required with client optional, which differs from UnderDasea's client and server setup.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| UnderDasea | Forge | 1.19.4 – 1.20.1 | Client and server | 2025-01-25 |
| Ocean World | Forge | 1.18.2 – 1.20.1 | Client and server | 2024-01-20 |
| Tax' Ocean Villager | Forge | 1.20.1 | Client and server | 2024-07-05 |
| Oceanic | Fabric, Forge and Quilt | 1.19.4 – 1.20.1 | Server required, client optional | 2023-07-18 |
Questions
Does UnderDasea need Geckolib?
Does the server need UnderDasea?
Is there a language option?
In the catalog
UnderDasea is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 34,764 mods support Minecraft 1.20.1.
Similar mods
What the author says
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
Official listing
- Modrinth page
- modrinth.com/mod/underdasea
- Owner
- leolerenardo
- Published
- 2024-06-10
- Updated on Modrinth
- 2025-01-25
- Facts verified
- 2026-10-15