One fish found in many Fiskeland waters is the tench, a carp fish also called doctor fish. The fish is rather unknown, being averse to both light and company. It prefers eutrophic, shallow lakes with lots of vegetation.
It is a popular game fish primarily in England doing coarse fishing. The tench is a recognized fighter when hooked on a rod. The weight is most often half a kilogram, but can reach two. It has a thick, slimy skin.