Allan, I was in South Carolina a few years ago, and we spent the day playing in the surf off of Myrtle Beach. That evening, after dinner, we went for a stroll on the pier there where a number of people were fishing. One man was gutting his catch and tossing the fish parts into the water, which was slightly illuminated in the light from the pier. There, about twenty feet below and maybe 100 yards from the beach, there was a variety of sharks in various sizes feeding on this stuff, big shapes that emerged from the depth, broke surface to feed, then disappeared.
Gave me a fresh view on my beach activities the next day, for sure.