Aqua Bounty Technologies Inc's genetically engineered salmon are as safe to eat as normal Atlantic salmon, U.S. regulators said in a preliminary analysis released on Friday.

The fish, called AquAdvantage, are genetically altered to grow twice as fast as normal Atlantic salmon. The Food and Drug Administration is weighing whether to approve the fish for the U.S. market and is set to hold a three-day public meeting starting September 19.

In documents released ahead of the meeting, FDA staff also said the fish were "highly unlikely" to produce significant effects on the environment.