A large and unusually warm mass of water is threatening to disturb the marine ecosystem along the Pacific Coast from Southern California to Alaska, scientists from the National Oceanic and Atmospheric Administration said Thursday.

They call it the Northeast Pacific Marine Heatwave of 2019, and if it doesn’t dissipate soon, researchers said it could be as destructive as the infamous “blob” of warm water that caused massive toxic algae blooms along the coast and wreaked havoc on whales, salmon, baby sea lions and other marine life in 2014 and 2015.