Fog Bow

On our way back from our recent trip across the water to Port Angeles we passed through some fog and witnessed the phenomenon pictured above. It was a colorless bright arc that seemed to follow the ship as we moved through the water. I Googled "white rainbow" since I had never seen one before and had no idea what its proper name might be. Quite logically it is called a fog bow and Wikipedia has a brief article explaining how it arises. It is also known as a seadog.