Pontobdella muricata
... that with a stretched length of up to 20 cm (8 in), Pontobdella muricata is one of the largest marine leeches?
... that with a stretched length of up to <span about="#mwt31" data-mw='{"parts":[{"template":{"target":{"wt":"cvt","href":"./Template:Cvt"},"params":{"1":{"wt":"20"},"2":{"wt":"cm"},"3":{"wt":"in"},"4":{"wt":"0"}},"i":0}}]}' id="mwAUc" typeof="mw:Transclusion">20</span><span about="#mwt31" typeof="mw:Entity"> </span><span about="#mwt31">cm (8</span><span about="#mwt31" typeof="mw:Entity"> </span><span about="#mwt31">in)</span>, <i id="mwAUg"><b id="mwAUk"><a href="./Pontobdella_muricata" id="mwAUo" rel="mw:WikiLink" title="Pontobdella muricata">Pontobdella muricata</a></b></i> is one of the largest marine leeches?