The one traditional Norwegian dish with a claim to international popularity is the smoked salmon. It is now a major export, and could be considered the most important Norwegian contribution to modern international cuisine. Smoked salmon exists traditionally in many varieties, and is often served with scrambled eggs, dill, sandwiches or mustard sauce. Close to smoked salmon is gravlaks, (literally “dug salmon”), which is salt-and-sugar-cured salmon seasoned with dill and (optionally) other herbs and spices. Gravlaks is often sold under more sales-friendly names internationally. A more peculiar Norwegian fish dish is Rakfisk, which consists of fermented trout, a culinary relation of Swedish surströmming.
Until the 20th century, shellfish was not eaten to any extent. This partly due to the abundance of fish and the relative high cost of time to catch shellfish over nutritional value, and that such food spoils rather quickly, even in a northern climate. However, prawns, crabs and mussels have become quite popular, especially during summer. Lobster is of course popular, but restrictions on the catch (size and season) limits the consumption, and in addition lobster has become rather rare, and indeed expensive.
People will gather for “krabbelag” (“crab party”) feasts, either eating ready cooked crabs from a fishmonger, or cooking live crabs in a large pan. This is typically done outdoors, the style being rather rustic with only bread, mayonnaise and wedges of lemon to go with the crab. Crabs are caught in pots by both professionals and amateurs, prawns are caught by small trawlers and sold ready cooked at the quays. It is popular to buy half a kilo of prawns and eat it at the quays, feeding the waste to seagulls. Beer or white wine is the normal accompaniment.-(Wikepedia)