I was under impression that it was a green policy to recommend people eat more fish, acting as a replacement for e.g. beef which (if I recall correctly, I'm not certain) has more harmful environmental effects than fishing.
It often feels like we think fishing is less environmentally harmful but we don't actually know it, because the ocean is extremely opaque to us, and has very high buffers both ways.
Numerous stocks have crashed and most times the collapse has been extremely brutal, similar to the passenger pigeon, going from "it's everywhere" to "it's nowhere" in a few years.
And even with what we know at least 1/3rd of current stocks are being overfished.
