Each spring, humpback whales start to feed off the coast of California and Oregon on dense schools of anchovies, sardines and krill—prey sustained by cool, nutrient-rich water that seasonal winds draw up from the deep ocean.  That process, known as coastal upwelling, turns the California Current into one of the most productive marine ecosystems in … Continue reading Whale Entanglements in Fishing Gear Surge Off U.S. West Coast During Marine Heatwaves