Ft DeSoto Park Florida. I did notice the marks on the beak. I'm thinking this pelican fought another bird like an Osprey for a fish. But no way of knowing what caused the marks.
I lived most of my life on the West Coast and all I ever saw were Brown Pelicans. Then we sailed the Intracoastal Waterway and that is when I first saw a white pelican. I couldn't believe my eyes. They are so beautiful. You have captured this one so well.