Scientific name - Pseudoboletia sp. Family – Temnopleuridae Common name – Pincushion Urchin Max Size – 4 in (10 cm) Range: Sri Lanka, Sumatra Care Level – Moderate Temperament – Peaceful Foods and feeding – It will roam the aquarium eating algae Aquarium suitability - Reef compatibility – Yes Captive care – This urchin can be a very helpful member of your CUC. They do best in larger aquarium with plenty of area for them to roam, with secure rockwork. They are known for causing rockslides when they find a spot to hide during the day. Like all invertebrates it is extremely sensitive to nitrates and copper, and small amount are fatal to it.