longtail stingray
... that tail length is not a reliable way to identify the longtail stingray, because its tail is often damaged?
... that tail length is not a reliable way to identify the <b id="mwER0"><a href="./Longtail_stingray" id="mwER4" rel="mw:WikiLink" title="Longtail stingray">longtail stingray</a></b>, because its tail is often damaged?