What you’re describing is different from what the Chinese distant water fishing fleet is doing. They’re essentially strip mining the ocean thousands of miles away from China, leaving the locals to deal with the ecological damage and resulting consequences.
Different and the same. What's the same is that it is a shared resource that people benefit privately from and there is no authority that can manage it globally. Like I say, those fish the Chinese caught are real, people are not sure what the long term consequences are.