Grounded Sunken Bones: Craftables & How To Find

A guide to find an important early to mid-game resource

One of the essential raw materials in the early and mid-game of Grounded is the Sunken Bones. The Sunken bones are mainly needed to craft valuable gear such as a Bubble Helmet and tier 2 best weapons like a Bone Dagger in Grounded, as well as required to complete the Koi Fish Armor Set, one of the best armor sets for underwater exploration.

Key Takeaways

Sunken bones are said to be tiny fragments of a creature that used to swim around in the Koi Pond.

  • Location: Koi Pond, Sandbox biome (Southwestern edge), Northern BBQ Spill biome.
  • Required Equipment: Gill Tube, Antlion Armor, Shovel, Hammer, Food, Water.
  • Finding T-Rex Bones: Visit Oak Lab, then Armed Raspberry Punch-O.
  • Crafting Materials: Sunken Bones used for Bone Dagger, Bone Trident, Rusty Spear, and Koi Scale Armor Set.

Where To Find The Sunken Bones?

Once you’re well-prepped for the journey, you can now begin to visit the areas where you can find some Sunken bones.

Koi Pond

Start by making your way to the Oak Lab towards the North of the map. This should theoretically be the first lab you visit, so it’ll be easier to reach.

Oak Lab Location on the map (Image Credits: eXputer)

Once you’re at the Oak Lab, head to the Armed Raspberry Punch-O Northeast of the lab. Traverse your way through the branches until you see a large, purple juice box on the edge of the pond.

Armed Raspberry Punch-O Juice box beside the Koi Pond (Image Credits: eXputer)
  1. After that, go to the back of the juice box and jump right into the Koi Pond.
  2. Remember to equip your Shovel, Gill tube, and/or any other underwater equipment at this stage since you’ll now need to swim directly to the Sunken T-Rex, which will be at the bottom of the pond.
  3. Next, when you’re in the pond, the first thing to do is swim downwards until you’ve hit the pond floor.
  4. This is necessary since you might miss the T-Rex at first if you’re too high up when swimming.
  5. The Sunken T-Rex is located right ahead of the Raspberry Punch-O, so when you jump in, you only need to go in one direction.
  6. Continue to swim North until you see a big, orange T-Rex underneath a pile of rocks.
The Sunken T-Rex (Image Credits: eXputer)
  1. Now, turn right and make your way down to the narrow path that should be right in front of you.
  2. Be sure to stay as low as you can so that you don’t miss the bones.
  3. As you continue down your path, you’ll eventually find the bones under some dirt, which you can dig out with your shovel and nab right away!
  4. There should be around 4 sunken bones in this area of Grounded.
  5. 3 of those bones will be on the pond floor and one will be sitting on the moss-covered branch close to the other bones, so don’t miss any!
A Sunken Bone was found lying on the branch (Image Credits: eXputer)

Sandbox Biome

The other location where you can find another set of Sunken bones is in the Sandbox biome. You can collect the bones by digging up the buried treasures scattered all across the sandbox.

Sandbox Biome Location on the map (Image Credits: eXputer)

The sandbox is located on the Southwestern edge of the map, alongside the Haze biome. Keep in mind that this is one of the most challenging places to explore since it causes a variety of debuffs like the Sizzle effect. In addition to that, there are a ton of dangerous insects crawling around in some of the holes in the area, shooting out smaller insects. Therefore, it’s important to be on your guard when exploring the area!

Sizzling Effect Status Bar on the top middle (Image Credits: eXputer)

You’ll spot a few glowing items under a pile of dirt as you move across the biome. This means that there’s buried treasure right underneath the dirt!

Glowing Buried Treasure (Image Credits: eXputer)

Equip your trusty shovel and start digging on the spot until you uncover the treasure. After that, use your hammer to bust open the treasure and collect the loot.

It’s important to note that since there are so many hidden treasures across the sandbox, you might either find the sunken bones on your first attempt, or it could take you a couple of diggings before you can finally uncover them in Grounded. So, continue digging and busting until you find every bone in the area!

BBQ Spill Biome

Finally, you approach the final biome, where you can collect the remaining set of sunken bones in Grounded. This final set can be found in the Northern BBQ Spill biome, located near the Upper Yard Ascent. We’ll start by going to the West part of the map, next to the Garden Gnome.

Garden Gnome location on the map (Image Credits: eXputer)

Once you reach the gnome, you’ll see a thin twig that’ll climb you up onto the stone slabs. Climb up the twig and jump onto the ledge of the stone wall.

Jump to the ledge of the stone wall from the stone steps (Image Credits: eXputer)

After that, continue to climb up the wall using the leaves and roots and once you’re at the top, head straight you’ll be at the doorstep of the biome. 

BBQ Grill Biome (Image Credits: eXputer)

This area also has the Sizzle Effect so you can equip any Sizzle defenses at this point if you have any, such as the Fresh Defense Mutation. Additionally, if you want to find out any other good mutations, you can check out this Mutations Tier List where we cover some of the best mutations which you can also equip and use as well.

Once you’re ready to go, you can begin finding the Sunken bones in the area. Use your shovel and hammer to dig out the glowing buried treasures and bust them open. Just like the Sandbox, this biome also has a ton of treasures across the area, so keep digging until you completely loot the place!

What To Craft With Sunken Bones?

These sunken bones will help in crafting a ton of useful items. It’s also important to note that every craftable item can be crafted at the Workbench Station.

Bone Dagger

A Bone Dagger is a neat Tier 2 Knife, which is much better than a Tier 1 Dagger in terms of combat speed and slicing down objects. To craft a Bone Dagger, you will need the following items:

Item Name Quantity
Sunken Bones 2
Silk Rope 2
Diving Spider 2

Bone Trident

The Bone Trident is a great Tier 2 Trident and weapon for underwater combat.

The items needed to craft a Bone Trident are:

Item Name Quantity
Sunken Bones 3
Diving Bell Spider Chunk 3
Silk Rope 3

Rusty Spear

A unique Tier 3 spear that inflicts a DOT Infection Debuff over enemies. To craft a Rusty Spear, you’ll need:

Item Name Quantity
Sunken Bones 1
Dust Mite Fuzz 3
Rust 7

Bubble Helmet

The Bubble Helmet adds 80 seconds of oxygen to the player, making it much easier and more efficient to explore larger bodies of water without any worry of drowning.

To craft a bubble helmet, you will need the following resources: 

Item Name Quantity
Sunken Bones 5
Eelgrass Strand 4
Silk Rope 4

Koi Scale Armor Set

The Koi Scale Amor Set is a great underwater armor set that centers around heavy defense and perfect blocking.

Koi Scale Chestplate

To craft a Koi Scale Chestplate, you’ll require the following raw items:

Item Name Quantity
Sunken Bones 2
Lilypad Wax  3
Eelgrass Strand 3
Koi Fish Scale 5

Koi Scale Greaves

To craft Koi Scale Greaves, we’re gonna need the following resources:

Item Name Quantity
Sunken Bones 3
Lilypad Wax 2
Eelgrass Strand 2
Koi Fish Scale 3


The Sunken Bones can craft a ton of valuable resources for your mid-game journey. While it may take some time for you to farm some Sunken bones, especially in the Sandbox and BBQ Grill biomes, the effort is certainly worthwhile since it’ll make the rest of your walkthrough much easier and quicker to finish. Apart from that, finding these bones will also lead you to explore some of the most challenging areas of the game, so you might also find some other valuable resources along the way!

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Sulaymaan Ahmad is a Senior Writer on eXputer who covers all the latest and greatest games. He has an engineering background and a knack for decimating players in First-Person Shooter games. He also enjoys narrative-driven games with characters he can emotionally invest in. Sulaymaan's love for gaming has been going strong for several years which is evident on his gaming profiles at Steam and PSN. Experience: 3+ Years || Written 150+ Guides || Mainly Covers Strategy Guides on eXputer

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