Nigiri is no salad, that is obvious. However, it is a good source of the sought-after heart healthy omega-3 fatty acids thanks to the fish that it is made with. Sushi is also generally well known for being low in calories, as there is no added fat in a sushi dish. The most common type of healthy sushi is actually Nigiri. Nigiri is actually very good for your health and just one piece of Nigiri sushi is only about 70 calories. This means that it would take quite a few plates of Nigiri to even come equal to McDonald's fries, and by the time you reached that amount of calories, you would likely be full already.
Nigiri is generally considered to be a weight-loss friendly food option. Eating sushi every day may not necessarily be healthy but getting some sushi instead of eating fast food will certainly help in a weight-loss journey.