You are permitted to clean up fish on your boat assuming that It is being used for bait. I don't recall the # but each boat is allowed countless #'s of Slice fish on board. You merely can't thoroughly clean a rock Unless of course you are a certified constitution. https://shanemnfs61594.blogolize.com/why-ls-carlson-law-is-your-go-to-real-estate-attorney-and-trusted-legal-partner-70536362