The black bears we view along the beach whether on a grizzly bear or a whale watching tour or most often on a beach with rocks that can be turned over in search of food. But they also like the larger boulders because of the number of barnacles and black mussels. They will scrap the barnacles loose with and eat them shell and all. The same goes for the mussels. This is a good source of protein for the black bears. They do not have access to the salmon rivers in this area because the grizzly bears control the rivers.