If you’ve spent hours wandering Subnautica’s alien oceans hunting for rare crafting materials, you’ve probably come across references to mercury 2 at some point. This high-tier resource is critical for building late-game gear like reinforced dive suits, advanced power cells, and upgraded scanner rooms, but most players struggle to track it down on their first few playthroughs. A lot of online guides give vague directions that lead you straight into leviathan territory, or skip over essential gear requirements that leave you stranded at 300 meters with no oxygen. I spent three separate runs swimming in circles through dangerous biomes before I stumbled on the right spot, so I put this guide together to save you the frustration of wasting oxygen or running into hostile leviathans for no reason.
Exact Mercury 2 Subnautica Location Coordinates & Biome Details
First off, let’s cut to the chase with the exact coordinates you can plug into your seamoth or prawn suit navigation system: -132, -340, 789. That spot puts you right at the edge of the Deep Grand Reef biome, right where it borders the northern edge of the Lost River. You won’t find mercury 2 deposits sitting out in the open when you first arrive, so you’ll need to pull out your scanner and sweep the rocky cliff faces and small cave entrances scattered around the area. The deposits are usually tucked behind small outcroppings or just inside shallow cave mouths, so keep an eye out for their distinctive silvery-blue glow that cuts through the dark deep water. You can usually spot the glow from 20 meters away even without your scanner, which is a huge help when you’re trying to move quickly through the area.
But don’t swim too far into the Lost River from this spot, unless you’re prepared for ghost leviathans that patrol the deeper sections of the cave system. I made that mistake on my first trip, and lost a fully upgraded seamoth before I even had a chance to grab a single mercury 2 ore. So stick to the upper cliff faces of the Deep Grand Reef first, and you’ll find at least 8 to 12 large mercury 2 deposits within a 100 meter radius of those coordinates. If you don’t find enough on your first sweep, check the smaller floating rock formations just north of the coordinate point, there are usually another 3 or 4 deposits tucked in the cracks there.
Gear You Need to Reach the Mercury 2 Site Safely
You can’t just swim down to this spot with a basic oxygen tank and expect to make it back alive. The location is over 300 meters deep, and there are plenty of small hazards and aggressive creatures in the area that can catch you off guard if you’re underprepared. I recommend bringing all of the following gear before you make the trip to collect mercury 2:
- A reinforced dive suit to protect you from both depth pressure and bite damage from smaller hostile creatures like crabsquids
- An upgraded high-capacity oxygen tank that gives you at least 150 seconds of air, plus a spare portable oxygen bladder for emergencies
- A seamoth with at least a level 2 depth upgrade and a perimeter defense system to scare off unwanted attackers
- A handheld scanner with the resource tracker upgrade installed to pick up mercury 2 deposits through rock walls
- At least two first aid kits, just in case you take a few hits while exploring the cave mouths
If you don’t have a reinforced dive suit yet, you can still get down to the location with a prawn suit that has a depth upgrade, but moving between deposits will be a lot slower. I always prefer taking a seamoth for this trip because it’s more maneuverable, and I can make a quick escape if I run into a leviathan that wanders too close to the mercury 2 deposit area. It’s also a good idea to park your seamoth at least 50 meters above the main deposit site, so you don’t accidentally hit it with your mining tool or draw creatures down to your escape route while you’re working.
Common Mistakes to Avoid When Collecting Mercury 2
Even if you have the right coordinates and gear, it’s easy to make simple mistakes that can cut your trip short or cost you valuable resources when you’re hunting for mercury 2. I’ve made almost all of these at some point, so I can tell you exactly what to watch out for. First, don’t ignore the small red flashes on your scanner that indicate nearby crabsquids. These creatures love to hide in the same cave mouths where mercury 2 deposits spawn, and they can disable your electronics with a single blast if you get too close. If you see one, either use your seamoth’s perimeter defense to stun it, or swim around to the other side of the cliff to find a different deposit. It’s not worth fighting them for a single ore.
Second, don’t forget to mark the deposit site on your map once you find it. Mercury 2 respawns every 30 in-game minutes, so you can come back as many times as you need once you know where it is. I forgot to mark it on my first playthrough, and spent another two hours trying to find the spot again a few days later. Third, don’t mine all the deposits in one trip if you don’t need to. Leaving at least 2 or 3 deposits unmined will speed up the respawn rate, so you won’t have to wait as long when you come back for more. You only need 12 mercury 2 ore to craft all the late-game items that require it, so don’t waste time carrying extra weight that will slow you down if you have to make a quick exit.
What You Can Craft With Mercury 2 Once You Collect It
Now that you know how to get to the mercury 2 Subnautica location safely, you’re probably wondering why it’s worth the trip to such a dangerous part of the map. This resource is one of the most versatile late-game crafting materials in the game, and it unlocks some of the most useful items you can get. The first thing most players craft with it is the reinforced dive suit, which gives you full protection from depth pressure up to 1000 meters, and cuts all bite damage by 70%. That suit alone makes exploring the deepest biomes like the Inactive Lava Zone way less stressful.
You’ll also need mercury 2 to build advanced power cells, which last twice as long as standard power cells for your seamoth, prawn suit, and base electronics. If you’re someone who likes to build large bases with multiple scanner rooms and grow beds, you’ll go through a lot of these power cells, so having a reliable mercury 2 source is a game changer. The other key item that requires mercury 2 is the thermal knife upgrade for your survival knife. This upgrade lets you harvest fish and plant matter twice as fast, and it can even stun small hostile creatures with a single hit if you get into a tight spot. I never leave my base without a thermal knife once I have access to mercury 2, it makes every part of the game so much easier.
At the end of the day, tracking down the mercury 2 Subnautica location doesn’t have to be the frustrating, time-consuming process that many new players make it out to be. With the right coordinates, a few basic gear upgrades, and a little bit of caution around the local wildlife, you can grab all the ore you need in less than 10 minutes, no unnecessary deaths or lost vehicles required. Next time you’re gearing up for a deep dive, keep this guide handy, and you’ll be crafting those late-game upgrades before you know it.
