This hypnotic footage captures an ‘orchestra’ of orcas singing to each other.

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.

US Coast Guard Fireman Niall Shannon filmed the close encounter with the pod near McMurdo Station in Ross Island, Antarctica.

Orcas produce sounds to navigate, communicate and hunt, using a combination of whistles, clicks, pulsed calls, pops and jaw claps.

This video was captured in January 2023.