Astropyga radiata – Red Blue Spotted Radiata Urchin
Reef compatible, peaceful, and suitable for intermediate aquarists.
Care level: Intermediate
Disposition: Peaceful
Minimum tank size: 50 gallons
Mature size: 8 inches
| Size | Range |
|---|---|
| Adult Diameter | 1.5″ to 2″ |
| Species | Red Blue Spotted Radiata Urchin |
| Brand | Violet Aquarium LLC |
FAQ
Is this species safe to keep with other reef inhabitants?
Yes, Astropyga radiata is reef compatible and generally peaceful, making it suitable for cohabitation with most reef fish and invertebrates.
What is the expected growth rate of this urchin?
The radiata urchin typically grows to a mature size of 8 inches over time, with a starting diameter of 1.5 to 2 inches.
Does this urchin require special lighting or water parameters?
Please contact customer service


Gavin Metcalfe –
The radiata urchin looks beautiful in my 50-gallon tank. It’s peaceful and doesn’t bother other fish. The color pattern is striking with red and blue spots. It has settled in well after a few weeks and is active during the day.
Robert Glover –
I added this urchin to my reef tank and it’s been thriving. It’s not aggressive and blends well with the coral. The size is as described, and it’s a nice addition to the display.
Anna Hart –
Great choice for intermediate reef keepers. The urchin is hardy and stays calm. I’ve had it for three months and it’s grown slightly larger than expected. Very satisfied with the purchase.