This gator was swimming along and then suddenly decided he wanted to open his mouth. Perhaps it was an aggression sign or a reminder to another gator that this was his territory. He was not "booming" as they do to make the water dance on their back. Who knows, maybe he just stayed up and watched Leno....
NIKON CORPORATION NIKON D300, f/8 @ 600 mm, 1/80, ISO 200, No Flash
copyright by Greg Stephens and Photography by Greg Stephens