International Aquatics
Blue Dot Pincushion Urchin
Blue Dot Pincushion Urchin
🛡️ International Aquatics Quarantine & Guarantee
All fish are checked by marine vets, given a formalin bath, and held for 14 days in copper-treated systems. We feed Selcon-soaked food with Kanaplex and Metroplex during quarantine. Unless marked, all livestock comes with our 15-Day Guarantee. You will receive a video of your fish eating before shipment. For size preference please add a note on your order and we will match your fish to your requested size. If you just want the fish without our QT process, Please email us directly with your order number. Please note this does waive the 15 day guarantee.
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My species/animal is an invertebrate: Blue Dot Pincushion Urchin (Astropyga radiata). It is a peaceful species that is reef-safe with caution, admired for its brilliant reddish to maroon body covered in long spines dotted with iridescent blue spots, striking radial patterns, and unique algae-grazing behavior.
Males typically cannot be visually distinguished from females, as this species is not sexually dimorphic, while juveniles are smaller with shorter spines and less pronounced coloration. They reach about 8–10 inches across including spines (with a central body diameter of 3–4 inches) and should be housed in aquariums of at least 100 gallons.
Provide ample live rock for grazing, open sandy substrate, and plenty of open space to accommodate its long spines. Care should be taken to secure aquascaping, as their movements can dislodge rocks and corals. Maintain stable water parameters (salinity ~1.020–1.025, temp ~72–79 °F, pH ~8.1–8.4). While they do not jump, a secure lid is recommended to prevent them from climbing into overflows or equipment.
Diet should consist of natural algae growth, supplemented with dried seaweed (nori), macroalgae, spirulina-based pellets, and occasional scavenged meaty foods such as mysis or brine shrimp. With proper care, this urchin makes a striking, functional, and hardy addition to a large reef aquarium, serving as both an algae grazer and a stunning display invertebrate.
International Aquatics Quarantine & Guarantee: All fish are checked by marine vets, given a formalin bath, and held for 14 days in copper-treated systems. We feed Selcon-soaked food with Kanaplex and Metroplex during quarantine. Unless marked, all livestock comes with our 15-Day Guarantee. You will receive a video of your fish eating before shipment. On request, we also send photos/videos after arrival at IA. Some species are import-to-order (3-10 business days). Many common species are already cleared or near the end of QT.
Several species will be import-to-order and may take anywhere from 3-10 business days to secure. Once your fish is secured, you will be notified, and the quarantine process will then begin.
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