(AP) -- Genetically modified salmon for dinner? Diners might not even know it.
If the Food and Drug Administration approves the engineered fish for human consumption, the agency then will have to decide the label it will carry in grocery stores. According to FDA rules, the fish will not be labeled as genetically modified if the agency decides it has the same material makeup as conventional salmon.
It is still unclear whether the agency will approve the fish, which was created by a Massachusetts company and grows twice as fast as its conventional counterparts. FDA officials reviewed the science of the modified fish Monday and will hold a hearing Tuesday to discuss the labeling issue, which has many food safety and consumer groups concerned.
Agency officials have said they believe the makeup of wild Atlantic salmon is essentially the same as genetically engineered salmon, though they have not made a final decision on its approval. A federal advisory committee that convened Monday to discuss the science said more data and testing may be needed to be sure the fish is safe.
Several consumer groups plan to argue Tuesday for more detailed labeling, saying it is the public's right to know. Dr. Michael Hansen, senior scientist at Consumers Union, the publisher of Consumer Reports, says his organization disagrees with the FDA that genetic engineering itself does not constitute a material difference in the two fish.
"It is essential to label a GE animal so that any unexpected effects will be recognized and consumer health protected," he said.
The Atlantic salmon engineered by the Massachusetts company, AquaBounty, has an added a growth hormone from a Chinook salmon that allows the fish to produce growth hormone all year long. The engineers were able to keep the hormone active by using another gene from an eel-like fish called an ocean pout that acts like an on switch for the hormone, which conventional salmon produces only some of the time.
In documents released ahead of the hearing, the FDA agreed with the company, saying there were no biologically relevant differences between the engineered salmon and conventional salmon, and there is a reasonable certainty that no harm will come from its consumption. FDA scientists said Monday there are very few differences between the modified and conventional fish.
If the FDA approves the sale of the salmon, it will be the first time the government allows such modified animals to be marketed for human consumption. AquaBounty submitted its first application for FDA approval in 1995, but the agency did not decide until two years ago to consider applications for genetically engineered animals.
Genetically engineered animals are not clones, which the FDA has already said are safe to eat. Clones are copies of an animal. In GE animals, the DNA has been altered to produce a desirable characteristic.
Ron Stotish, CEO of AquaBounty, said at Monday's hearing that his company's fish product is safe and environmentally sustainable. But critics have two main concerns: The safety of the food to humans and the salmon's effect on the environment.
Because the altered fish has never been eaten before, they say, it could include dangerous allergens, especially because seafood is highly allergenic. They also worry that the fish will escape and intermingle with the wild salmon population, which is already endangered. They would grow fast and consume more food to the detriment of the conventional wild salmon, the critics fear.
The FDA tried to allay both of those concerns Monday, saying the fish shouldn't cause any allergies not already found in conventional salmon and there is little chance they could escape. But the advisory panel, which was formed to give input to the agency and did not hold a final vote, cast some doubts on whether there was enough evidence to back up those assertions.
It is still unclear whether the public will have an appetite for the fish if it is approved. Genetic engineering is already widely used for crops, but the government until now has not considered allowing the consumption of modified animals. Although the potential benefits - and profits - are huge, many people have qualms about manipulating the genetic code of other living creatures.
If approved, the fish could be in grocery stores in two years, the company estimates. The company is arguing that the fish does not need to be labeled as genetically engineered. Stotish said, "The label could even be misleading because it implies a difference that doesn't exist."
Explore further: Turning algae into biofuels
More information: Background on FDA meeting: http://tinyurl.com/ylp5ccv