Killer whales (orcas) returned to the Northwest Pacific, wearing their popular 'salmon hats' after 40 years. In the 1980s, these whales displayed a bizarre trend of placing dead salmon on their heads.
Orcas, the ocean’s charismatic black-and-white predators, are donning “salmon hats” again—balancing dead fish on their heads as they swim. The behavior, first seen in 1987, has mystified ...