These Antarctic Orcas are spyhopping (taking a look above the surface). They do this while looking for prey and when looking for directions back out to sea.
The Antarctic is a gorgeous but fragile place, and Antarctic research scientists just released a study showing how the 40,000 tourists coming down each year have been damaging the ecosystem. Best to enjoy Antarctica thru documentaries & let the scientists do their important work: https://www.youtube.com/watch?v=dH573B1bkHI