I mean, the USSR’s state-run actions completely drained and destroyed one of the largest inland seas in the world. Public isn’t always the answer either.
What really works for ocean policy is putting informed experts in charge of global regulations and everyone adhering to the rules under strict observation and penalties. It’s just really hard to get those institutions setup.
There’s an opportunity to use the existing UNCLOS framework to establish rules around commercial fishing operations, but they’ve been stalled for years. Likely because China is the worst offender and currently disputes a lot of the rules around sea/ocean territory given their interests in their immediate maritime spaces.