This first-ever comprehensive global view of #whale migration superhighways from 'Protecting Blue Corridors' - a new report by WWF & our partners @ucsc, @OregonState, @unisouthampton & others -looks at the growing threats #whales are facing around the world🌏from: 🎣Entanglement in fishing gear (bycatch): killing an estimated 300,000 whales, dolphins, and porpoises each year, it is the deadliest threat by far.