Grey whales are seen to be skinny and underfed as they head south towards their maternity wards. This is bad, it's hard to have a healthy baby when you can't gain weight. And losing weight while pregnant is beyond bad, it's a serious problem.
We've seen reports of starving whales linked to global warming, and now this about whales failing to fatten up as expected in the Arctic waters where they normally eat a LOT and get FAT so they can last through birth and nursing in warm southern waters without eating.
Some have speculated that grey whales are simply at their carrying capacity, there are as many whales as the ocean can support. Hmm, this is a provocative idea that deserves further comment...soon.