Juvenile Laughing Gull

Here is the Picture of the sea bird we tried to ID at the Market today.
The picture was taken at 1:24pm on Wednesday Sept. 8th
We were about 3 miles off shore and about a mile or 2 west of Cape Enrage when I took this picture.
The bird had no fear of people. It stayed with us for about an hour. It would peck at the chum ball we had set up to attract sharks. Then it would circle the boat (flying) and hover about 2 or 3 feet over from my head and about a foot above it.
While in the water it kind of looked like a morning dove. The boat captain said he had been on the bay all of his life and has never seen one of these birds before.

Let me know what you come up with

thanks
Don LeBlanc