I didn't have a camera on deck when this leviathan passed by about 150 yards away. I mistook it for a nuclear missile sub at first, and thought of the Bahahaha boat sunk by a whale near here last year. Based on the dorsal fin way aft (circled), we're quite sure this was a blue whale. I did my best to get this picture at extreme range. Keep in mind that the dorsal fin is well forward of the tail. What an incredible sight to see. This was yesterday between Oceanside and San Diego. The birds provided a bit of scale. I'm sure this is the biggest living thing I've ever seen.