What Is Super Frozen Tuna?

Did you know 80-90% of the tuna sashimi in the US is treated with carbon monoxide before you ingest it?

This unsafe method is completely banned in Japan, all of Europe, Canada, Taiwan, and China. This is a method companies use to preserve color and disguise the age of the product and potentially mask spoilage to fool you, the consumer.

At Fish for Sushi, we pride ourselves in doing the exact opposite by providing the highest quality sashimi available. Since our Tuna is preservative- and additive-free, you can rest assured that none of the Tuna you buy from Fish for Sushi is ever carbon monoxide treated. Instead, our Tuna is Super Frozen.  




What Does Super Frozen Mean?

What makes Fish for Sushi's Tuna quality superior to most you can buy in the market? The fact that it's Super Frozen. Super freezing stops the natural decay that begins when the fish is caught. When defrosted, Super Tuna revives to exactly the moment it was frozen, right after catch on the Tuna boat.  Super frozen tuna is all-natural Tuna, with no preservatives.

The History of Super Freezing

Super Freezing was discovered by the medical industry in the late 1960’s. This freezing process is used by blood banks, fertility clinics and labs around the world to preserve living cells and tissue, and store or transport them for an infinite period of time with no loss of quality. The process is used worldwide to preserve freshly caught Tuna, particularly in Japan, where 80% of Tuna is Super Frozen. 

The Super Freezing Process

 > Step 1: The process begins on the Tuna boat, far out on the high seas. Our boats are manned by specialized: long-line fishermen only. Our commitment to sustainable fishing practices helps eliminate collateral damage to other species such as dolphins, porpoises or deep sea turtles.

> Step 2: Once the Tuna is caught, it is quickly gilled and gutted.

> Step 3: The Tuna is then immediately placed into super freezers, freezing to a core ultra low temperature (ULT) of -76ºF, the Eutectic Point or EP.

> Step 4: The entire process is complete within 10- 20 hours out of the water.

From Catch to Kitchen

From "catch to kitchen," we deliver top quality tuna that is transported at the precise temperature to ensure freshness. The result? Fresh tuna that's reflected in the naturally vibrant, deep red color the Tuna recovers upon defrosting - the natural color of freshly caught Tuna.

Ready to taste the difference for yourself? Browse our collection of premium, Super Frozen products.