You know, sushi as a kind of Japanese food. It’s (usually raw) fish, rolled in rice and a leaf of alga or kelp.
Germans also have their kind of sushi: Fischbrötchen 🙂
It’s a roll with some kind of fish or with a fish rissole. You can have it with fried fish, smoked fish or raw fish. Different kinds of fish are used for the different dishes.
On the right you can see a Matjes in the roll. Matjes is a young, raw herring. You can also have sour pickled herring (Bismarck-Hering). For smoked fish you can usually have salmon, mackerel, trout or eel. When in the right season you can also have you roll with cooked crabs.