Also along the shore are two more sub-adult grizzlies siblings. These siblings will stay together for four or five years. If one is female they will separate when she first comes into season. This two bears are working on another source of protein – mussels. As the photo shows the grizzlies use their claws to scarp the mussels off the rocks and eat them with the shells. When the tide is higher they have to be content grazing on the sedge grass.