A typical legal rationale for protecting the consumer is based on the notion of policing market failures and inefficiencies, such as inequalities of bargaining power between a consumer and a business.
It sounds kind of expensive when you first check out, but it's actually pretty cheap if you consider it. Take something standard like a Philly roll (nori, salmon, cream cheese, cucumber, avocado). At Maki it will cost you $6, but the roll is pretty fat and you get 10 pieces. Most sushi bars charge around $5 and give you 6-8 pieces.
California Roll is a contemporary style maki-zushi (roll) containing cucumber, cooked crab meat or an imitation, and avocado that is made inside-out (Uramaki) with rice on the outside and an outer layer of tobiko or sesame seeds, shown here with a similar maki-zushi with raw tuna, which is darker. Main article: Sushi.