This is salmon sushi.
Sushi rice is formed into an oblong shape by hand. and placed thinly sliced raw salmon on it.
Salmon is oily and has nice taste.
By the way, "salmon" is "Sake" or "Shake" in Japanese.
But we rarely call salmon as ingredient of sushi "Sake" . we usually call it "samon" as ingredient of sushi. ( actually we pronounce like "SAAMON" )
I suppose the reason is that salmon sushi is new comer.
Traditionally we didn't eat salmon as raw. because, generally wild salmon is not good to eat as raw.
But nowadays, we can eat raw salmon which is cultured raised.