The fish in the pic you're talking about is collared. Basically bled, gutted, and head removed. The belly is packed with ice and the fish is put in the hold on ice. You HAVE to bleed to fish and collar it ASAP when you get it on board. When these tuna are offloaded, they are put in a coffin box, put on a plane, and flown to japan within hours. The buyers are experts at determining the quality of the meat and fat. They take samples on the spot to determine the price. A tuna not cleaned properly doesn't get you much and gives you a bad rap. These are all sashimi grade tuna, raw, sushi, maguro....just some jap names for them. Basically, sushi-grade fresh.
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