black swan leech
... that the black swan leech attaches itself to the skin or eye of a fish before working its way to the gill chamber?
... that the <b id="mwAY4"><a href="./Trachelobdella_lubrica" id="mwAY8" rel="mw:WikiLink" title="Trachelobdella lubrica">black swan leech</a></b> attaches itself to the skin or eye of a fish before working its way to the gill chamber?