velvet horn
... that the velvet horn is fed upon by the sap-sucking slug?
... that the <b id="mwAas"><a href="./Codium_tomentosum" id="mwAaw" rel="mw:WikiLink" title="Codium tomentosum">velvet horn</a></b> is fed upon by the <a href="./Elysia_viridis" id="mwAa0" rel="mw:WikiLink" title="Elysia viridis">sap-sucking slug</a>?