How will humpbacks cope with this year's marine heatwave and El NiΓ±o? π The 2014β16 heatwave is linked to a 20% drop in North Pacific humpbacks, about 7,000 whales, by 2021. Researchers think many starved. Pictured: BCY1000 "Hydra" breaching. #HumpbackWhales #ClimateChange
