I predict that the old man will not kill the marlin because when the old man was yang he caught two fish and one if thim is a girl and the other is a boy but somehow the boy fish escape. So i think the fish will not attack the old man and I think the old man will talk to the fish and let the marlin go. Then the marlin will come back with a lot of fish. Also the fish might bring the old man back to the land. That is what I predict.