Scientific name - Eucidaris tribuloides\r\n\r\nFamily – Cidaridae\r\n\r\nCommon name – Pencil, Mine, Club Urchin\r\n\r\nMax Size – 5 in (12 cm)\r\n\r\nRange: Caribbean, Philippines\r\n\r\nCare Level – Moderate\r\n\r\nTemperament – Peaceful\r\n\r\nFoods and feeding – It will roam the aquarium eating algae and other invertebrates \r\n\r\nAquarium suitability - \r\n\r\nReef compatibility – No\r\n\r\nCaptive care – This urchin will hide during the day and come out at night to forage for algae and small invertebrates. It can damage corals. It should be in an aquarium with lots of hiding places and secured rockwork. It is known from moving rocks around. Also, if it holes up, never try and remove it. Its spikes will break before it will let go. Like all invertebrates it is extremely sensitive to nitrates and copper, and small amount are fatal to it.