Pincushion Urchin

(Reef: With Caution)(2-3") These urchins are from the tropical Atlantic Ocean.  They are algae grazers that typically graze all day.  They may "collect" things in a reef tank such as shells, coral polyps, algae and other debris that they use to camoflage themselves. They may also eat coraline algae if not enough food present. (Tripneustes gratilla)