Being farm-raised, the Atlantic salmon reportedly showed advantages over the Pacific salmon, such as no parasites, easy animal capture, and could be grown with higher fat content. With government subsidies and improved techniques, they were so successful in raising fatty and parasite-free salmon they ended up with a surplus. Norway has a small population and limited market; therefore, they looked to other countries to export their salmon. The first Norwegian salmon was imported into Japan in 1980, accepted conventionally, for grilling, not for sushi. Salmon had already been consumed in North America as an ingredient in sushi as early as the 1970s. Salmon sushi did not become widely accepted in Japan until a successful marketing partnership in the late 1980s between a Norwegian businessman tasked with helping the Norwegian salmon industry and the Japanese food supplier Nichirei. Other sushi creations to suit the Western palate were initially fueled by the invention of the California roll (a with crab or imitation crab, cucumber, and avocado). A wide variety of popular rolls ( and ) have evolved since. 'Norway roll' is another variant of filled with (omelette), imitation crab and cucumber, rolled with leaf and , topped with slices of Norwegian salmon, garnished with lemon and mayonnaise. is a medium-sized cylindrical style of sushi with two or more fillings and was developed as a result of the creation of the California roll, as a method originally meant to hide the nori. differs from other because the rice is on the outside and the nori inside. The filling is surrounded by nori, then a layer of rice, and optionally an outer coating of some other ingredients such as roe or toasted sesame seeds. It can be made with different fillings, such as tuna, crab meat, avocado, mayonnaise, cucumber, or carrots. Examples of variations include the rainbow roll (an inside-out topped with thinly sliced and avocado) and the caterpillar roll (an inside-out topped with thinly sliced avocado). Also commonly found is the "rock and roll" (an inside-out roll with barbecued freshwater eel and avocado with toasted sesame seeds on the outside). In Japan, is an uncommon type of ; because sushi is traditionally eaten by hand in Japan, the outer layer of rice can be quite difficult to handle with fingers. In Brazil, and other sushi pieces include cream cheese in their recipe. Uncommon for the traditional recipe, this is the most common ingredient