<br /> <p>A tour group on a sightseeing cruise to Ningaloo Reef off the coast of Western Australia became witnesses to an epic battle between a pod of killer whales and humpback whales defending their young.</p><p>Boat operator Prue Wheeler said the orcas killed two out of four baby humpback whales in the attack that lasted for five hours.</p><br /><p>“To see firsthand a successful and an unsuccessful kill for the killer whales was incredible,” she told Storyful.</p><br /><p>“With the humpback whale protecting her newborn calf on her back – lifting her out of the water and using the shallow reef in her favour – while watching the orcas working in pack formation, will be something none of us there will ever forget.”</p><br /><p>This video shows the hunt, while amazed passengers on the SV Keira</a> commented on the spectacle. Credit: YouTube/SeaLife Differently SV Keira</p><br />
