black limpet
... that the black limpet feeds on the black turban snail without harming it?
... that the <b id="mwA1Q"><a href="./Lottia_asmi" id="mwA1U" rel="mw:WikiLink" title="Lottia asmi">black limpet</a></b> feeds on the <a href="./Tegula_funebralis" id="mwA1Y" rel="mw:WikiLink" title="Tegula funebralis">black turban snail</a> without harming it?