Had this snake come up on shore right in front of us while we were catfishing and I guess he was showing us how it was done! I took some good (and bad) pics close up just because he had his mouth full. I put them in a little video as well for you to check out.. https://www.youtube.com/watch?v=hIQ_th3Ma4I
That's a cool thing to see, especially as close as you were. I've had turtles steal fish off my stringer years ago, had a friend in Alaska that lost a large halibut to a Sea Lion, but never heard of a snake taking a fish away.