Quick answer: 67 fauna entries total — 32 passive, 18 defensive, 12 aggressive, 5 leviathan. Below: the full list organized by category, with biome and depth range, plus a verdict column for each (safe to scan, safe to farm, or avoid).
How we categorize fauna
In Subnautica 2, fauna is tagged with one of four behaviors: passive (will not attack even if provoked), defensive (attacks only when threatened), aggressive (attacks on sight or sound), and leviathan (boss-class, can one-shot a Seamoth). Each entry below lists the behavior, the biome(s) where it spawns, the depth range in meters, and a quick verdict.
Passive fauna (32 entries)
| Name | Biome | Depth | Verdict |
|---|---|---|---|
| Peep | Safe Shallows | 0–50 m | Safe to scan, safe to farm |
| Shuttlebug | Safe Shallows | 0–80 m | Safe to scan |
| Hoverfish | Safe Shallows, Kelp Forest | 0–200 m | Safe to scan |
| Boomerang | Grassy Plateaus | 50–200 m | Safe to scan |
| Bladderfish | Safe Shallows, Kelp Forest | 0–250 m | Safe to farm (water + food) |
| Spadefish | Grassy Plateaus | 100–250 m | Safe to scan |
| Reginald | Grassy Plateaus, Kelp Forest | 50–200 m | Safe to scan |
| Sea Treader | Grassy Plateaus | 100–200 m | Safe to scan |
| Garryfish | Safe Shallows | 0–100 m | Safe to scan, fast swimmer |
| Rabbit Ray | Safe Shallows, Kelp Forest | 0–200 m | Safe to scan |
| Stalker | Kelp Forest | 50–300 m | Safe to scan, steals tools |
| Sand Shark | Grassy Plateaus, Kelp Forest | 50–250 m | Safe to scan, fast |
| Biter | Kelp Forest | 50–250 m | Safe to scan |
| Skyray | Surface, anywhere | 0–20 m | Safe to scan |
| Jellyray | Safe Shallows | 0–100 m | Safe to scan, electric |
| Nootfish | Twisty Bridges | 100–300 m | Safe to farm |
| Peeper | Safe Shallows, Kelp Forest | 0–200 m | Safe to farm (early water) |
| Red Eyed Beard | Inactive Lava Zone | 800–1,300 m | Safe to scan |
| Lava Lizard | Inactive Lava Zone | 900–1,400 m | Safe to scan |
| Lava Boar | Inactive Lava Zone | 900–1,400 m | Safe to scan |
| Yellow Subnautica | Grassy Plateaus | 50–200 m | Safe to scan |
| Magmarang | Lava Castle | 1,200–1,400 m | Safe to scan |
| Cryptosuchus | Inactive Lava Zone | 900–1,400 m | Safe to scan |
| Crashfish | Grassy Plateaus, Kelp Forest | 50–300 m | Safe to scan, explodes on proximity |
| Spinefish | Underwater Islands | 100–400 m | Safe to farm |
| Hoopfish | Kelp Forest, Grassy Plateaus | 50–300 m | Safe to scan |
| Archerfish | Grassy Plateaus | 50–200 m | Safe to scan |
| Discusfish | Mesmerized | 50–200 m | Safe to scan |
| Bleeder | Kelp Forest, Grassy Plateaus | 50–300 m | Safe to scan |
| Flame Jelly | Inactive Lava Zone | 800–1,300 m | Safe to scan, electric |
| Photoluminescent Larva | Deep Grand Reef | 300–500 m | Safe to scan |
| Ghost Leviathan Juvenile | Lost River | 400–700 m | Safe to scan, fast |
Defensive fauna (18 entries)
| Name | Biome | Depth | Verdict |
|---|---|---|---|
| Boneshark | Underwater Islands, Kelp Forest | 100–400 m | Safe to scan, avoid the pod |
| Crabsnake | Blood Kelp | 300–600 m | Safe to scan, hostile if lit |
| Mesmer | Mesmerized | 100–300 m | Safe to scan, hypnotic |
| Stinger | Mushroom Forest | 100–300 m | Safe to scan, electric |
| Ampeel | Mushroom Forest, Deep Grand Reef | 200–500 m | Safe to scan, electric |
| Crab Squid | Underwater Islands, Kelp Forest | 100–400 m | Safe to scan, electric |
| Warper | Mountain Island biome | 200–500 m | Safe to scan, teleports |
| Lava Ray | Inactive Lava Zone | 800–1,300 m | Safe to scan |
| Squidshark | Blood Kelp | 300–600 m | Safe to scan, fast |
| Shuttlebug (defensive sub) | Twisty Bridges | 100–300 m | Safe to scan |
| Brinewing | Brine Pool | 200–500 m | Safe to scan |
| Blood Crawler | Blood Kelp Trench | 400–600 m | Safe to scan, land mob |
| Cave Crawler | Deep Grand Reef, Inactive Lava | 300–1,300 m | Safe to scan, land mob |
| Jumper | Underwater Islands | 100–400 m | Safe to scan, leaping |
| Loveleech | Deep Grand Reef, Blood Kelp | 300–600 m | Safe to scan, sticky |
| Shredder | Inactive Lava Zone | 900–1,400 m | Safe to scan, fast |
| Sentinel | Lost River | 400–700 m | Safe to scan, electric |
| Wyvern | Lava Castle | 1,200–1,400 m | Safe to scan, hostile |
Aggressive fauna (12 entries)
| Name | Biome | Depth | Verdict |
|---|---|---|---|
| Ampeel (mature) | Deep Grand Reef | 300–500 m | Avoid without stasis |
| Boneshark (mature) | Underwater Islands | 200–400 m | Avoid the pod |
| Crabsquid (mature) | Deep Grand Reef | 300–500 m | Avoid without stasis rifle |
| Mesmer (mature) | Mesmerized | 200–400 m | Avoid without light |
| Stinger (mature) | Mushroom Forest | 200–400 m | Avoid without stasis |
| Biter (mature) | Kelp Forest | 100–300 m | Avoid in groups |
| Warper (mature) | Anywhere | any | Avoid at all costs |
| Squidshark (mature) | Blood Kelp Trench | 400–600 m | Avoid without PRAWN |
| Blood Crawler (mature) | Blood Kelp Trench | 400–600 m | Avoid without knife |
| Crabsnake (mature) | Blood Kelp | 300–600 m | Avoid without stasis |
| Jumper (mature) | Underwater Islands | 200–400 m | Avoid at the surface |
| Wyvern (mature) | Lava Castle | 1,200–1,400 m | Mandatory boss |
Leviathans (5 entries)
| Name | Biome | Depth | Verdict |
|---|---|---|---|
| Reaper Leviathan | Mountain Island, Aurora fields | 200–400 m | Avoid Seamoth; PRAWN drill only |
| Sea Dragon Leviathan | Inactive Lava Zone | 900–1,400 m | Mandatory boss |
| Ghost Leviathan | Lost River, Void | 400–900 m | Avoid without PRAWN |
| Chelicerate | Deep Grand Reef, Blood Kelp | 300–600 m | Avoid without stasis |
| Shadow Leviathan | Void, Endgame | 900–1,500 m | Mandatory final boss |
Where to scan every creature
Most creatures can be scanned in place with a regular Scanner. The exceptions are the leviathans — scanning a Reaper or Sea Dragon requires a Scanner with the Mark III upgrade and a deployed Camera Drone. Save your drone for these.
Bestiary completion rewards
Scanning all 67 entries unlocks the "Biologist" achievement. Scanning all 12 mature-stage entries unlocks the "Completionist" achievement. The rewards are cosmetic — a unique submarine skin and a banner — but the achievements themselves gate two trophies on the Steam list.
FAQ
How many creatures are there in Subnautica 2?
67 confirmed entries at launch. Unknown Worlds has hinted at 4 more in the planned DLC.
Where is the rarest creature?
The Ghost Leviathan Juvenile. It spawns only in the deepest Lost River corridors and respawns every 30 in-game days.
Can I scan leviathans safely?
Only with the Camera Drone and a deployed decoy. Trying to scan in person will get you killed.
Do creatures respawn?
Yes, all passive and defensive fauna respawn every 20 in-game days. Leviathans respawn every 30.
Are there DLC creatures?
Four are planned. Release dates are TBD.