Habitat? what a joke, that has been the biggest lie I ever heard. If the fish are present they will find a way, but without fish there is no chance.

Picture hundreds of fish traps up and down both shores of the Canal, year round prior to 1900, then massive white commercial harvest with gill nets till the 50's, then in 1972 after the bolt decision, gill nets corked off the mouth of every inlet into the Canal until it was a waste of time to set them. By 1975 it was all over.