conchfish
... that the conchfish conceals itself in the mantle cavity of a living mollusc?
... that the <b id="mwBpU"><a href="./Astrapogon_stellatus" id="mwBpY" rel="mw:WikiLink" title="Astrapogon stellatus">conchfish</a></b> conceals itself in the <a href="./Mantle_(mollusc)" id="mwBpc" rel="mw:WikiLink" title="Mantle (mollusc)">mantle cavity</a> of a living <a href="./Mollusca" id="mwBpg" rel="mw:WikiLink" title="Mollusca">mollusc</a>?