Genetically engineered salmon has reached the dinner table. AquaBounty Technologies, the company in Maynard, Massachusetts, that developed the fish, announced on August 4 that it has sold some 4.5 tons of its hotly debated product to customers in Canada.

The sale marks the first time that a genetically engineered animal has been sold for food on the open market. It took AquaBounty more than 25 years to get to this point.

The fish, a variety of Atlantic salmon (Salmo salar), is engineered to grow faster than its non-genetically modified counterpart, reaching market size in roughly half the time — about 18 months. AquaBounty sold its first commercial batch at market price: US$5.30 per pound ($11.70 per kilogram), says Ron Stotish, the company’s chief executive. He would not disclose who bought it.

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