sand burrowing brittlestar
... that the sand burrowing brittlestar is often found in association with the sea potato?
... that the <b id="mwAU0"><a href="./Acrocnida_brachiata" id="mwAU4" rel="mw:WikiLink" title="Acrocnida brachiata">sand burrowing brittlestar</a></b> is often found in association with the <a href="./Echinocardium_cordatum" id="mwAU8" rel="mw:WikiLink" title="Echinocardium cordatum">sea potato</a>?