Owens pupfish
... that the entire global population of the Owens pupfish was once contained in two buckets?
... that the entire global population of the <b id="mwCRg"><a href="./Owens_pupfish" id="mwCRk" rel="mw:WikiLink" title="Owens pupfish">Owens pupfish</a></b> was once contained in two buckets?