The Sinking City 2 locked buoy solution

The Sinking City 2 locked buoy is a confusing puzzle involving fish and a code that makes little sense and, if I'm honest, I kind of solved it accidentally. However I did solve it and if you're here, you haven't. So let me tell you what you need to do now I've worked out what's going on. It's a weird little challenge that seems designed to be confusing, and not one you can tackle until a while after you first find it, so it's easy to get a bit lost. The Sinking City 2 locked buoy solutionThe sol