"You cannot trust commercial fishermen to fish sustainably"

Especially the crporate fleet, and the government folks who enable their operation.

There's a TV documentary series running here about Scottish trawlers.
In the last episode we were taken on board a prawn trawler. The prawns were proving elusive but in the search tons of fish were being unintentionally caught. Under EU law because the vessel was a prawn trawler it was only allowed to take a certain quantity of fish. Once that was exceeded any additional fish had to be thrown back in, even though they were now dead.