Overview
The Yellow Boxfish (Ostracion cubicus) is a advanced saltwater species known for its bright yellow, black spots (juvenile) coloration. Releases toxin when stressed. Mid.
Origin & Appearance
Origin: Indo-Pacific.
Colors: Bright Yellow, Black spots (juvenile).
Body Shape: Globiform (round/inflatable). Typical adult dimensions: 45.0 x 20.2 x 24.8.
Sexual Dimorphism: Minimal.
Tank & Water Requirements
| Min Tank Size | 125 gallons |
| Temperature | 75–79°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | very-high |
| Oxygen Demand | high |
| Plant Safe | yes |
| Aquarium Position | Mid |
Behavior & Activity
Slow hovering using pectoral fin sculling; rigid boxy body limits agility; steady deliberate movement; releases toxin if stressed
Speed: 25/100Aggression: 3/10diurnal
Breeding
Not bred at home
Common Diseases
💊 Ich💊 difficult to feed
Expert Notes
Releases toxin when stressed