Marine Animal Encyclopedia
Sea Potato Echninocardium cordatum
Most sea urchins live in rocky areas, but the sea potato or heart urchin burrows in the sand. Unlike regular urchins, it has a distinct front end and its spines are thin and flattened. Special spoon-shaped spines on the urchin’s underside help it to dig, while longer spines on its back allow water to funnel down into its burrow to be used for respiration. The dried shell, or test, of this urchin resembles a potato, hence the common name.