Overview
The Nautilus (Nautilus pompilius) is a advanced saltwater species known for its brown-white, spiral shell with chambers coloration. Needs deep cold water. Mid.
Origin & Appearance
Origin: Indo-Pacific.
Colors: Brown-White, Spiral shell with chambers.
Body Shape: Cephalopod (soft-bodied). Typical adult dimensions: 20.0 x 16.0 x 8.0.
Sexual Dimorphism: Moderate; males have hectocotylus arm.
Tank & Water Requirements
| Min Tank Size | 125 gallons |
| Temperature | 59–68°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | high |
| Oxygen Demand | high |
| Plant Safe | yes |
| Aquarium Position | Mid |
Behavior & Activity
Jet-propelled deep-water swimmer; regulates buoyancy by gas in shell chambers; slow vertical migration; pulsing jet movement
Speed: 25/100Aggression: 5/10nocturnal
Breeding
Terminal; dies after breeding
Common Diseases
💊 Senescence after breeding💊 escape artist
Expert Notes
Needs deep cold water; specialized setup