When the whales come up with mouthfuls of krill and other little fish, the gulls all surround them and will pick out those little fish or eels for themselves. If you look closely you can see one on the back of the whale and a gull with one in its mouth. The gulls will ever grab them from the mouth of the whale sometimes even getting closed in there till the whale opens up and releases it. The whales do not eat gulls.