Sashimi-grade fish is quite expensive, and as the sashimi-grade process is explained above, there is a wide range of prices, depending on quality. Generally, the more expensive the fish, the fattier and more buttery the taste. High-quality toro, salmon, and yellowtail have an amazingly rich and succulent flavor. For me, Toro is the richest, salmon the most buttery, and yellowtail has a slightly fruity, soft, and lighter taste.