I saw in the news that China consumes 50% of the world's caught fish.
In economics, exploiting shared resources is called "the tragedy of the commons" and refers to the common grazing area used by a community of farmers. When they share equitably, there are no problems, but when one adds extra livestock to graze, he depletes the land available for the rest. If he continues to do that, the others get pushed out.
It's as prevalent today as it's ever been, and getting a lot worse. We've lost sight of working for the common good, and President Trump is intent on removing the US from all international agreements that constrain its commercial operations so that it can gain a competitive advantage. No good will come of this.