There are a good number of places in Subnautica that you have to be careful when you go to, or if you are thinking about building in a certain biome, then there are some biomes that you’ll have a hard time going, so because of how hostile and dangerous they can be.
It’s good to know which biomes are those so you can be careful of them. This guide will show you which biomes are the most dangerous in the game, from least to most dangerous.
- You can reach the first place on the list by starting from the coral tube that sticks out of the water and heads north or one notch to the left or north until you reach the underwater island’s biome.
When going there, bringing a sea moth with at least an MK1-MK2 depth module, perimeter defense, a knife, and maybe a static rifle if you want to be extra safe is recommended.
Now for people already familiar with Subnautica, this biome probably isn’t all that bad, but the number of bone sharks in the area can kill you pretty easily if a good number of them go after you at the same time. They also tend to attack vehicles like sea moths and prawn suits even while you aren’t in the since bone sharks are drawn to light.
So leaving your vehicles unattended in this biome can be painful as bone sharks in the area can easily destroy your vehicles or even kill you if you aren’t careful.
The good thing is that bone sharks are easy to kill as you can kill one easily using your survival knife, or you can make it even easier by freezing one using your stasis rifle and then attacking it with your knife. They also don’t take that many hits to kill, either.
So if you bring a few first aid kits, a stasis rifle, and a knife, you can easily kill the bone sharks without much trouble.
So, in general, the bone sharks make this biome a sort of dangerous biome, especially because there are so many of them in the underwater islands.
2. You can reach the next biome by using the same coral tube starting point again and heading about two notches to the right of the southeast until you reach a cave entrance in the grassy plateau’s biome.
When going there, it is recommended to bring a sea moth with at least an MK1-MNK2 depth module, perimeter defense, a knife, and maybe a stasis rifle if you want to be extra safe.
This is the hole you are looking for, and when you find it, you need to head down and into the jelly shroom caves.
This biome is dangerously similar to the reasons that the underwater islands are; the two main threats you’ll run into in this biome are bleeders, which are like tiny parasites that’ll latch onto you and deal small damage for as long as they are attached. You can cut them off using your knife.
The other threat you’ll encounter is crab snakes which are bigger than bone sharks, but unlike bone sharks, they do slightly more damage and are big enough to grab you, which is mainly how they damage you. They can also damage your sea moth and prawn suit, should they get neat.
Fortunately, for the most part, crab snakes don’t try and seek you out if you are in the area. They only really come after you if you get too close to them, and they usually are seen swimming near the large jelly shrooms in the cave. As long as you are wary of them, you will be fine. You can use always stasis Rifle-knife to kill them or use perimeter defense if you are in a sea moth To ward them off if they bother you in the caves.
So the crab snakes make this biome a dangerous one, especially for a newer and less experienced player. But if you know what you’re doing, you shouldn’t have too much trouble with these creatures.
On the plus side, this is a pretty biome, though.
3. You can use the same coral tube starting point to get to the next biome. Head about one notch and a half to the left of the southwest until you reach the grand reef biome.
When going there, it is recommended to bring a sea moth with at least an MK1-MK2 depth module, perimeter defense, a knife, and a stasis rifle, as there can be a potential leviathan in the biome.
- The Grand Reef is also home to many dangerous creatures. Starting, you can find warpers scattered around the biome, and if you are infected, they will attack you; depending on what stage of the infection you are in, they will deal higher damage to you. They can also warp you out of your sea moth and prawn suit.
You can either attack them enough using your knife until they warp away. You must try to avoid them, or you can use perimeter defense on them if you are in a sea moth and can get close fast enough.
There is also a ghost leviathan that can be found in the biome. Ghost leviathans are just as dangerous as reapers; they can damage your vehicles and easily kill you if you aren’t in a vehicle. You can use perimeter defense against them to ward it off if it gets close, or if you get caught off guard and aren’t in a vehicle, then you can use your stasis rifle against it.
The other creature that you can find here that is also very dangerous is crab squids which you can find mainly in the caves of the grand reef. They can set off an emp and disable your vehicle if they get near you, and they can deal decent damage to you and whatever vehicle you might be in. You can use the stasis rifle against them or perimeter defense if you get close quick enough to use it before they set off an emp.
5. You can reach the next location by heading about one and a half notches to the right of the northeast until you reach the bulb zone biome.
When going there, it is recommended to bring a sea moth with at least an MK1-MK2 depth module, perimeter defense, a knife, and a stasis rifle, as there is a creature here that you cannot use perimeter defense against.
Now there are two main threats in the bulb zone that you’ll have to worry about bone sharks and ampeels. The good thing about the bone sharks here is that there aren’t nearly as many of them as in the underwater islands, so they are a bit less intimidating here but still wary of them.
The main threat, and what makes this place a dangerous place, is the ampeels which have a ton of health considering the creature’s size. They can seriously damage you and your vehicles; even going near them can hurt you a little. You must avoid them when you see them, as perimeter defense on the sea moth does not affect them.
Now if one does start to come after you, you can use the stasis rifle to freeze it, giving you time to run away. Or you can use the repulsion cannon (if you have that), but this creature can be a pain to deal with in the biome.
This biome is also close to the mountains and crash zone, which both have reaper leviathans. There is a chance that a reaper could wander into the bulb zone for a short time and potentially come after you depending on how close or far you are to it.
6. To reach the next biome, you need to head one notch to the right of the northeast until you reach the northeastern mushroom forest.
When going there, it is recommended to bring a sea moth with at least an MKI-MK2 depth module, perimeter defense, a knife, and a stasis rifle if you want to be extra safe.
When arriving at the biome, you’ll encounter bone sharks. They can do semi-decent damage to you and your vehicles, but there aren’t as many of them, so they aren’t as dangerous as in the underwater islands.
Now the reaper leviathan is the big threat you may or may not run into when you come here. There is one that can potentially go into the mushroom forest from the crash zone near the aurora and one that you may see when you get near the forest that borders the mountain biome. There are two potential reapers you might see in this biome, which are exceptionally dangerous.
Reapers leviathans can damage your vehicles and, again, nearly kill you with one hit. You can counter them by avoiding them as best as you can. If one gets near or grabs you, you can use perimeter defense against it to ward it off. You can get away using the grapple arm if you are in a prawn suit. If it catches you while you aren’t in your vehicle, then you can use your stasis rifle to freeze it and run away from it.
7. To reach the next location, you must head about one notch to the right of the northwest until you reach one of the blood kelp trench biomes.
When going there, it is recommended to bring a sea moth with at least an MKI-MK2 depth module as well as perimeter defense, a knife, and a stasis rifle, or you can bring a cyclops or an upgraded prawn suit as well if you don’t want to use a sea moth.
The blood kelp biome goes down fairly deep in terms of depth and has many threats in the biome to match. As you can see, one of those threats is crab squids in the grand reef. They can disable your vehicles and do decent damage to you and the vehicles they disable; you can use the stasis rifle against them or perimeter defense if you are fast enough.
Another creature you may encounter is a warper, which can teleport you out of your prawn suit or sea moth and attack you. You are immune to this teleportation if you are in a Cyclops, but if you are fast enough in a sea moth, you can get close and use perimeter defense against them to get them back off. Or if they teleport you out of your vehicle, you can use your knife and attack them enough until they warp away from you.
Another major threat is the ghost leviathan found at the blood kelp trench. If you find it, you have to avoid it as best as you can, but if you can’t, you can use perimeter defense against it or freeze it with the stasis rifle if it starts to get too close.
The last creature you may encounter are ampeels which are immune to perimeter defense; they can do big amounts of damage to you and your vehicles. They can also shock you if you get too close to them, so your best bet against them would be to use the stasis rifle to freeze it or the repulsion cannon against it if you can’t avoid it and it chases you.
8. You have to head southeast until you reach the crash zone to reach the next location.
When going there, it is recommended to bring a sea moth with at least an MK1-MK2 depth module, perimeter defense, a knife, and a stasis rifle.
Now there is one main creature you will run into: the reaper leviathan, which is again one of the most dangerous creatures in the game. You must try to avoid it as best as possible if you see it. You can use perimeter defense against it to get it away from you, or you can use your stasis rifle to freeze it in place giving you time to run away.
There aren’t any wrecks in this biome. There are a total of ten reaper leviathans in the crash zone.
To reach the next place, start from the coral tube and head about two notches to the left of the northwest until you reach the dunes biome.
When going there, it is recommended to bring a sea moth with at least an MK1-MK2 depth module, perimeter defense, a knife, and a stasis rifle. Or you can bring a prawn suit or Cyclops instead of the sea moth if you want.
The dunes are pretty much dangerous for the same reason that the crash zone is, but it is slightly more dangerous. A total of & reaper leviathans can be found in the biome, which is all extremely dangerous, so you must avoid them as best as you. You’ll have to worry about another threat in this biome and reapers, though.
On top of reapers, you will also run into warpers in this biome which can warp you out of your sea moth or prawn suit if you are in one of those when getting near one. If it does warp you, you can attack it using your knife till it warps away, or you can run from it.
This biome is also darker, so it can be a little hard to see creatures coming toward you from further away, but the added threat of warpers makes this biome a little more dangerous than the crash zone in my list. There are three wrecks in the dunes.
9. The next place you can reach by using the same starting point and, this time, heading about 2 notches to the left of the northeast until you reach the mountain biome.
When going there, it is recommended to bring a sea moth with at least an MK1-MK2 depth module, perimeter defense, a knife, and a stasis rifle. You can bring a prawn suit or Cyclops instead of the sea moth.
Now the mountains have pretty much the same creatures as the dunes. The slight difference is that there are seven reapers in the mountain biome instead of the eight in the dunes. But in the mountains, the reapers are much closer to each other since the mountains aren’t as big an area as the dunes. The dunes are much more open, so the reapers are more spread out.
There are two wrecks in the mountain biome.
10. You can reach the last two places by heading in the same direction. You must use the same starting point and head about a notch to the right of the northeast until you reach a large hole/cave entrance in the bulb zone biome.
When going there, bringing a fully upgraded prawn suit and an upgraded Cyclops is recommended, as you will be going 500m+ down. You can also bring extra power cells for your vehicles and a reinforced dive suit.
Once you reach the large hole, head west/into the hole until you reach the lost river biome.
The lost river is one of the cooler-looking biomes, but it is also just as dangerous. Ghost leviathans are one of the biggest threats in the biome, as some can be found in certain parts of the lost river. River prowlers are the other threat you will encounter in the lost river.
River prowlers are the lost river version of bone sharks, although they attack faster than bone sharks. You can kill them by freezing them and then attacking them with your knife, or you can simply avoid them (they cannot attack the Cyclops).
There is also this green mist you can see near the seafloor that will damage you when you go into it, so be aware of that when in the lost river.
Now when going this way into the lost river, you need to use this way to get to the next location, so all you have to do to reach the next and final spot is keep going straight through the cave until you reach a large hole with a ghost leviathan swimming near it.
Once you reach this hole, head down to the bottom of it, and you should see some lava; you will continue straight until you reach another large open area, the inactive lava zone. When you get down the hole, there is only one direction you can go in, so it’s very hard to get lost or thrown off here.
Now, as you come out of this archway /entrance, you will see another hole if you look down to your left. Going down that hole will take you to the lava lakes below the inactive lava zone.
11. The inactive lava zone/the lava lakes is the most dangerous biome in Subnautica. There are three main threats you will encounter here; the first is biggest threat here that being the sea dragon leviathan, probably the most dangerous leviathan in the game next to the ghost leviathan; it can bite you, swipe at you with its arms, and shoot fireballs at you from a distance, I would try to avoid it as best as you can if you do see it, you can hit it with the stasis rifle if you need to as well.
The next threat is lava lizards, similar to bone sharks, but they can harden their skin using lava, making themselves harder to kill, and they can shoot that lava out as a fireball at you. You can kill them using a knife and stasis rifle combo. You can also just avoid them as best as you can.
The last threat is warpers.
Another thing, not a threat, but you do need to take note of lava larvae, leeches that latch onto your vehicles and sap power from them for as long as they are attached; you can scrape them off using your knife, though.
The last thing is that if you are not wearing a reinforced dive suit when you leave your vehicle in this biome, you will burn and take fire damage for as long as you are out of a vehicle or not in a structure/base. So ensure you have a reinforced dive suit before coming to this biome.
