A woman sailing a yacht in the Mediterranean Sea filmed a frightening encounter with a huge orca, which attacked her vessel by repeatedly banging into it. | ABC News

Orca can behave very differently based on which region of the sea they live in. Each group has their own "cultures," specialised to the local ecology. Some orca groups are also transient and have their own set of behaviours and prey preferences. These transient orca, passing through Puget Sound in the northwest Pacific, are hunting a small whale. Watch Beneath the Waves this World Oceans Day on June 8th at 7pm, on National Geographic WILD UK. | National Geographic UK

ORCA VIEW!! To understand how orcas use their habitat and forage on herring, we'll be attaching camera-tags that record the diving behaviour through a combination of data logging and footage. According to ethical guidelines, each tag should provide good data with minimal consequences to the animals To minimize induced disturbance or discomfort, the tags are attached with suction cups, the least invasive attachment method. Each deployment is conducted following a strict protocol approved by the N

Orcas across the globe use their incredible intelligence and underwater communication skills to stay on top of the food chain. Orcas live in close-knit family pods and adults can weigh up to 6,000kg. Despite their immense size and intelligence, they can still be at risk from human activity. Tune in to Secrets of the Whales from Sunday June 2nd at 8pm, on National Geographic WILD UK. | National Geographic UK

Stunning drone footage of an incredible orca encounter! | storyful