Credit: SWNS / Niall Shannon / AMAZING ANIMALS + / TMX<br /><br />This hypnotic footage captures an ‘orchestra’ of orcas singing to each other.<br /><br />The jaw-dropping video shows multiple orcas - or ‘killer whales’ - in the icy sea before the camera pans underwater to reveal the mammals singing together.<br /><br />US Coast Guard Fireman Niall Shannon filmed the close encounter with the pod near McMurdo Station in Ross Island, Antarctica.
