Overview
The Fire Urchin (Astropyga radiata) is a advanced saltwater species known for its red, blue bioluminescent dots coloration. Red/blue bioluminescent. Surfaces.
Origin & Appearance
Origin: Indo-Pacific.
Colors: Red, Blue bioluminescent dots.
Body Shape: Urchin (spherical/spiny). Typical adult dimensions: 20.0 x 20.0 x 14.0.
Sexual Dimorphism: Minimal.
Tank & Water Requirements
| Min Tank Size | 53 gallons |
| Temperature | 75–81°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | low |
| Oxygen Demand | medium |
| Plant Safe | yes |
| Aquarium Position | Surfaces |
Behavior & Activity
Slow surface grazer with venomous spines; bioluminescent spots glow while tube feet propel slowly across reef
Speed: 15/100Aggression: 1/10diurnal
Breeding
Not bred at home; broadcast spawner
Common Diseases
💊 Sensitive to salinity💊 copper
Expert Notes
Red/blue bioluminescent; venomous spines