English: This photograph was taken off the Graham Coast, Antarctica from on board the National Geographic Explorer expedition ship. It captures four killer whales swimming in close synchronization just below the surface of the water as they charge an ice floe bearing a crabeater seal. By cooperatively hunting in this manner, the whales create a strong bow wave with which they hope to wash the seal off the ice floe. The seal, known informally as "Kevin", eventually escaped after enduring three dozen such attempts to make him into a shared meal.