Marco Verschoor, son and flyfisher, about to release a fish. Stone walls run along the shores of Lake Oostvoorne. We fish a lot on the 'inside' of these walls, but making longs casts into the lake itself can be very productive as well, as some of the pictures in this row will show. Late in the evening, after 10, fish will come very close to the walls to feed on small shrimp, saltwater cressbugs and what not.