Pretty common when it's hot people don't have coolers or ice ,fish go bad,they take a picture and dis-guard the fish. All the marina's by me got fed up with it and now don't allow throwing any fish or parts in water ,they must be bagged and put in a dumpster. Many people also realize the bigger fish are not really great to eat so after the tackle shop picture they dump the fish. Pretending to forget the fish and leaving them on the dock after a picture is also becoming an issue. Welcome to the new generation of bass fishermen.