Heart Urchin shell

Description:

Heart urchin, any echinoid marine invertebrate of the order Spatangoidea (phylum Echinodermata), in which the body is usually oval or heart-shaped. The test (internal skeleton) is rather fragile with four porous spaces, or petaloids. The body is covered with fine, usually short spines. Reference: https://www.britannica.com/animal/heart-...

Habitat:

Heart urchins live in burrows lined with mucus. The common heart urchin (Echinocardium cordatum) occurs in all oceans. Reference: https://www.britannica.com/animal/heart-...

Notes:

Several Heart urchin shells have been found together with different seastar species in the sand bar of Port Barton, San Vicente.