Killer Whales Head-to-Head (IMAGE) NOAA National Marine Fisheries Service Caption In an exhibit of playful behavior, two killer whales nuzzle head-to-head. These whales were photographed by an unmanned aerial vehicle from 100 feet. Credit Photo credit: NOAA, Vancouver Aquarium. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.