When a grizzly bear is more concerned about a small piece of salmon on its leg than the one slipping into the water it means it is not worried about catching another. The white shapes in the water around the bear are salmon. The past summer was very hot, the water level in the river low which caused low oxygen content in the water and a die off of several thousand salmon. For this reason the grizzlies knew they could easily catch salmon to eat. This lasted for several weeks until the rains came and fresh salmon moved up river.