Here’s a story form NOAA Fisheries discussing increased whale entanglements in nets on the West Coast due to a warming Pacific.  The meat of the story is that “warm temperatures attracted subtropical species rarely seen in the region. The krill that humpback whales typically feed on grew scarce. The whales switched to feed instead on high concentrations of anchovy that the warm, less productive waters had squeezed into a narrow band near the coast”.  This has lead to a record number of entanglements.