A sea urchin spends its life on the ocean floor, covered in spines, eating algae and asking nothing of anyone. The Orange Sea Urchin keeps the spines and moves to the wall. It is a ceramic sea urchin 4.5 inches across and 3 inches deep, hung from one screw, with no water, no tank and no salt involved. Real urchins come in purple, black and dark red. This one is orange, which no urchin has ever been, and it has not asked for an opinion on the matter. It hangs in under two minutes and stays exactly this shade.