It was the most apparent at Nigel Harrhy’s Match Pool where he had spent ages sculpting the pegs and the fish move in and create their own landscape. I plumbed up under a rope and the water was a foot deeper than when I had last plumbed it a year before!

I used to have half a dozen small carp in a large tank and would arrange the gravel and rocks into a picturesque, pleasing scene with hills and troughs and during the night you could hear the carp hoovering up and spitting out the gravel and every morning you would get up to a billiard table. 😡 lol

As these fish were less than 6-8oz you could just imagine the landscaping that a shoal of large carp could get up to.

As many fisheries are litterally holes in the ground I think wave action accounts for much of the undercuts I have seen. On many lakes if you clear out the margin swim you will be stunned to check out how far undercut some banks are. The best example I have found is on our club lake where one swim is undercut by 3 foot plus.
If you can get back to a bare bank with suitable depth many foul hooking problems dissapear.
Compounding the problem is bank side vegitation which will natually grow out into the lake as its a rich source of water for any plant to flourish.