Subnautica Creature Size Comparison
Documented lengths from scans and model data, from the 11 m Squidshark to the 180 m Sea Emperor. Pick any two.
Visual comparison
All values
Click any row to load it as Entry A.
| Name | Value | Context | Source |
|---|---|---|---|
| Reaper Leviathan One meter longer than the Cyclops. | 55 m (180.4 ft) | Released scan measurement | In-game scan: 55 m |
| Sea Dragon Leviathan Largest aggressive creature in game one. | 112 m (367.5 ft) | Released scan measurement | In-game scan: 112 m |
| Ghost Leviathan (adult) Crater Edge enforcer. | 108 m (354.3 ft) | Model records 107-110 | Model data: 107-110 m, 108 shown |
| Ghost Leviathan (juvenile) Already longer than a Reaper. | 67 m (219.8 ft) | Lost River juveniles | Model data: 67 m |
| Sea Emperor Leviathan Largest living creature in game one. | 180 m (590.6 ft) | Documented 160-200 range | Documented range 160-200 m, 180 shown |
| Reefback Leviathan Passive floating ecosystem. | 70 m (229.7 ft) | Model measurement | Model data: 70 m |
| Sea Treader Leviathan Walks the seabed in herds. | 20 m (65.6 ft) | Model measurement | Model data: 20 m |
| Ice Worm Land ambusher of the Arctic Spires. | 95 m (311.7 ft) | Below Zero scan | In-game scan: approx 95 m |
| Shadow Leviathan Crystal Caves patroller. | 60 m (196.9 ft) | Below Zero model | Model data: 60 m |
| Chelicerate Standard form, not the Void variant. | 40 m (131.2 ft) | Below Zero model | Model data: 40 m |
| Glow Whale Rideable and pettable giant. | 30 m (98.4 ft) | Below Zero scan | In-game scan: approx 30 m |
| Ventgarden Height, not length. Stationary. | 110 m (360.9 ft) | Below Zero height | Model data: 110 m tall |
| Frozen Leviathan Deceased specimen. Estimate labeled. | 150 m (492.1 ft) | Below Zero estimate with tail | Estimated 150 m total |
| Squidshark Databank files it under carnivores. | 11 m (36.1 ft) | Scan calls it leviathan-class | Scan: approx 11 m |
About this converter
Subnautica documents size unevenly and this table respects the difference. The Reaper at 55 meters and the Sea Dragon at 112 come from released scan text, the strongest evidence. The Reefback at 70 and the Ghost adult at 108 come from model records, solid but second tier. The Sea Emperor spans a documented 160 to 200 meter range, shown at 180 with the range noted. The Gargantuan Fossil stays out entirely: only 402 meters of remains exist and thousand-meter totals are extrapolations, not measurements. The Sea Emperor at 180 meters is more than sixteen times the 11-meter Squidshark, with the Frozen Leviathan at 150 close behind.
How to use it
Pick two creatures and a unit in the top row. The three boxes below stay linked: one holds a count of the first, one the matching count of the second, one the length in the chosen unit. Change any box and the other two update. Try 1 Sea Dragon against Reapers.
Ventgarden is 110 meters tall, a height among lengths, labeled per entry. Below Zero and original game creatures share one table with the game named each row.
FAQ
How big is the Reaper Leviathan?
55 meters long per its released scan, one meter longer than the Cyclops submarine.
How big is the Sea Dragon Leviathan?
112 meters per its released scan, the largest aggressive creature in the first game.
What is the biggest Subnautica creature?
The adult Sea Emperor at 160 to 200 meters among living creatures. The Gargantuan Fossil extrapolation is excluded as unmeasured.
Is the Squidshark a leviathan?
Its scan calls it leviathan-class but the Databank files it under carnivores. Both facts are kept in the entry.
Sources
- Subnautica in-game PDA scans (Reaper, Sea Dragon, Ice Worm, Glow Whale)
- Subnautica Wiki model dimension records (remaining creatures)
- Console Pulse documented-size ranking (evidence tier cross-check)
Last verified: 2026-09-27 · 14 entries
More creature sizes converters
Godzilla and Kaiju Size Converter (Height Comparison)
How big is Godzilla? Compare 16 kaiju heights: Monsterverse Godzilla, Kong, Ghidorah, Shin Godzilla and more. Meters, feet and visual bars.
Aircraft Carrier Length Comparison (Overall Meters)
Compare 13 aircraft carrier overall lengths: Juan Carlos 231 m, De Gaulle 261, Queen Elizabeth 284, Fujian 316, Ford 333. Official navy figures in one table.
Airliner Length Comparison (Widebody Meters)
Compare 8 widebody airliner lengths in meters, from the A330neo at 63.69 m to the 777-9 at 76.72 m. Maker spec figures in a linked tool. for fans today.
← Submarine Length Comparison (Nuclear Classes) · Subnautica Depth Range Comparison (Crush Depths) →