Overview
The Common Octopus (Octopus vulgaris) is a advanced saltwater species known for its variable (brown, red, white - camouflage) coloration. Intelligent escape artist. All levels.
Origin & Appearance
Origin: Worldwide.
Colors: Variable (Brown, Red, White - camouflage).
Body Shape: Cephalopod (soft-bodied). Typical adult dimensions: 60.0 x 48.0 x 24.0.
Sexual Dimorphism: Moderate; males have hectocotylus arm.
Tank & Water Requirements
| Min Tank Size | 79 gallons |
| Temperature | 64–75°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | high |
| Oxygen Demand | high |
| Plant Safe | yes |
| Aquarium Position | All levels |
Behavior & Activity
Intelligent crawling swimmer; walks on eight arms over surfaces; jet-propulsion bursts; squeezes through tiny gaps; color-changing
Speed: 55/100Aggression: 5/10nocturnal
Breeding
Terminal; dies after breeding
Common Diseases
💊 Senescence after breeding💊 escape artist
Expert Notes
Intelligent escape artist; short lifespan ~1yr