Salmon nigiri sushi feels like melting in the mouth. How to achieve that? I am trying to make sushi at home and I'm buying fresh salmon from Whole Foods. The sushi tastes good, but it's missing something. The salmon feels too "fishy" and solid. If one eats at a good sushi restaurant, the salmon nigiri feels like it melts in one's mouth and I can't manage to do it like this. 

So far, I have tried:
1. To cut the salmon in thin pieces - the same result.
2. To cut it parallel to the skin and perpendicular to it - same result
3. To change from farmed to wild salmon - same result

I don't understand how to prepare the salmon to make it feel like it's melting when you eat it. Anyone has any experience with this and would like to share with me? Ia there a special way to prepare it or it is the salmon type?

P.S. The next step is to let it warm to room temperature because so far it was taken out from the fridge.
A technique, sushi chefs use is called dry curing. It means covering the fish in sugar and salt (3:1 ratio), I’ve seen recipes calling for 20 minutes to 1.5 hours. This will draw moistrure out, concentrating the taste, and will definitely have an effecf on the texture.

Another one is, freezing for bacterial reduction, try looking for fish that has been frozen at really low temperatures. When frozen, water in the muscle tissue will freeze and expand, damaging the muscle fibers, which will also contribute to the texture you’re looking for. You can try replicating this at home, except for the food-safety part, by freezing the fish for a long time, some recipes call 3-4 days.