A pair of orca swim near the surface in the chilly waters of the Norwegian arctic. The orcas migrate into fiords in this region during late fall and winter to feed on herring that often overwinter here. In late November the ‘Polar Night’ occurs, with weeks on end of darkness. Successful feeding by the orca involves complex communications and echolocation. Specialized feeding strategies such as this are examples of culture found among whale and dolphin families.