Wels or sheat-fish. A large catfish from central and northern Europe, the largest river fish in Europe after the sturgeon. They are inactive during the day, feeding during the night mainly on mussels and crayfish, though they will feed on live fish if they are injured. Not indigenous to Britain but may be found from time to time in rivers as some have been introduced in an effort to broaded the range of sporting fish for anglers.
Clabbered milk or longmilk. Milk, mixed with a little soured cream (US: cultured sour cream), which has been left to stand in a warm place until it has set. It is usually served with sugar, sprinkled with ginger and cinnamon and present with knäckebröd or ginger snaps. It is more commonly found in Finland and Sweden than in other Nordic countries.
Pike-perch or zander. It is a river fish with delicate flavour. They can be differentiated from the perch by the relatively large space between their dorsal fins and their elongate, fusiform body, which is never so steeply arched behind the head as it is in the Perch. The flesh is firm and white with a stronger flavour than cod. It was introduced into the United Kingdom in the 70's and is in danger of wiping out native species of fish.
