Seamoth Arms (BepInEx - Nautilus)
🟠 Updated over a year agoThis mod may not work until the author updates it. Check for an update, or see the rollback guide.
⚠️ Install Order · 2 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview

🔍 Analysis
- 👍 2.2% endorsement rate — high engagement, a strong quality signal
- 🏆 #3 of 124 Vehicles and Upgrades mods in this game by downloads
📋 About This Mod
IMPORTANT!!
SMLHelper versions no more supported!
Steam Legacy Branch no more supported!
(older version remains available in the Files tab)
Features:
-
[]MOD create a new Equipment Type: "SeamothArm" integer code: 100
[
]MOD create a copy of all Exosuit arms (claw, drill, grappling, propulsion and torpedo) with this new type.[]These arms can only be used in Seamoth.
[]These arms can be crafted in the Vehicle Upgrade Console.
[]Slot Extender is required for MOD to work!
[]Arms now is fragment based.
[]Fragments must be found and scanned.
[]Three fragments must be scanned for each type of arm.
[]Fragments removed!
[]For unlock: scan same type of exosuit arm.
Using Arms:
-
[]Arms can be select with default button "O" Left Arm and "P" Right Arm.
[
]Only one arm can be used at a time.[]If the arm is selected, it can be activated with the left mouse button.
Requirements:
-
[]BepInEx Subnautica Pack
[]Nautilus
[]Modded Arms Helper (BepInEx - Nautilus)
[]Slot Extender (BepInEx - Nautilus)
Installation:
-
[]You must have all requirements installed.
[]Simply extract the SeamothArms archive into your BepInEx\plugins\ folder.
TechType and fragment location help:
[]"SeamothClawArmFragment" for "SeamothClawArmModule"
[] Locations: Crash zone sand, Kelp forest sand, Grassy plateaus sand.
[]"SeamothDrillArmFragment" for "SeamothDrillArmModule"
[] Locations: Mushroom forest sand; Grassy plateaus sand; Dunes sand plateau.
[]"SeamothGrapplingArmFragment" for "SeamothGrapplingArmModule"
[] Locations: Crag field sand/rock/ground.
[]"SeamothPropulsionArmFragment" for "SeamothPropulsionArmModule"
[*] Locations: Mountains sand/rock; Koosh zone
-
[]You must have all requirements installed.
-
[]BepInEx Subnautica Pack
-
[]Arms can be select with default button "O" Left Arm and "P" Right Arm.
Seamoth Arms is a Subnautica mod that allows the Seamoth vehicle to use arms, similar to the Prawn Suit. It has 4,345 endorsements and 193,840 downloads, indicating strong community support. Last updated in August 2025, it is a popular enhancement for players seeking more functionality from their Seamoth.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Huge download count (193,840) shows it's a must-have for many players.
- Endorsement ratio (4,345) reflects solid community approval.
- Recent update (Aug 2025) means it's likely compatible with current game versions.
⚠️ Cons
- Description is minimal—no details on which arms are included or how they function.
- No installation instructions provided, so you'll need to know BepInEx basics.
- Potential compatibility issues with other Seamoth mods—no compatibility notes given.
For Subnautica players who want to turn their Seamoth into a more versatile vehicle, especially those who enjoy the Prawn Suit's arms but prefer the Seamoth's speed. If you're looking for a simple, popular enhancement without extra features, this is for you. Skip if you want detailed documentation or additional customization options.
💡 Beginner Tips
- Make sure BepInEx is installed correctly before adding this mod—check the BepInEx console for errors.
- Use a mod manager like r2modman to handle dependencies automatically and avoid conflicts.
- Test the Seamoth arms in a creative save first to see how they behave with your other mods.
📊 Mod Details
- Game
- Subnautica Mods
- Author
- Senna
- Version
- 2.1
- Downloads
- 193,840
- Endorsements
- 4,345
- Category
- Vehicles and Upgrades
- Created
- 12/8/2019
- Updated
- 8/21/2025
🔧 How to Install Subnautica Mods
Download from Nexus.
📖 Full step-by-step install guide for Subnautica →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for Subnautica commands, item IDs, and more.
Keep browsing — more Subnautica mods await