blotched fantail ray
... that when threatened, the blotched fantail ray raises its spine-bearing tail over its body and waves it back and forth?
... that when threatened, the <b id="mwGro"><a class="mw-redirect" href="./Blotched_fantail_ray" id="mwGrs" rel="mw:WikiLink" title="Blotched fantail ray">blotched fantail ray</a></b> <i id="mwGrw">(pictured)</i> raises its spine-bearing tail over its body and waves it back and forth?