Oval urchin found between stones at the bottom of a rock pool. Port St Johns, Wild Coast, Eastern Cape (2021). Also referred to as the burrowing urchin or the rock-boring urchin. Test oval when viewed from above, purple to black. Spines fairly long and stout, tapering evenly to a sharp tip. Spine color purple, brown… Continue reading Oval urchin (Echinometra mathaei)