The fish and amphibians in the lakes are under considerable pressure from predatory birds, including herons and cormorants. They have benefited from the planting of reedbeds and the creation of fish-refuges.
Most easily seen are a number of large Carp that often cruise close to the surface of the water, but there are also Gudgeon, Stickleback, Roach and Perch.
Amphibians are represented by the common frog, common toad, and smooth newt. With the creation of wetland areas and marginal plantings they should find many more areas with suitable cover.