[overlordalex]

Huh, seemed pretty effective at first glance. It also lead me down a wiki rabbit hole from the dogger bank to similar nearby features, which came full circle with the Cleaver Bank where Greenpeace also sunk some boulders. Except apparently they were removed by the fishers...

    The Cleaver bank is in 2015 considered for protection as a Marine protected area. The Greenpeace organisation considered the actions of the Dutch government in this direction too slow and sunk some large boulders on the seabed in May 2015 to increase the nature value.[7] Dutch fishers lifted the boulders on 16 June 2015, because they were afraid the boulders would damage their fishing gear.[8]

https://en.wikipedia.org/wiki/Cleaver_Bank

[arcticfox]

This seems like an asymmetric win for Greenpeace. It has to be like 10x easier to chuck boulders around than find and retrieve them.

[theptip]

Maybe that's a benefit of something like artwork - removing it would presumably be a crime?

[a_shovel]

If not a crime, at least it would look way worse in the press than removing some featurless concrete blocks.

[melagonster]

if fisherman adopt more environment friendly technology, they will find stone increase number of fish.