Alaskan U.S. Senators Mark Begich and Lisa Murkowski are asking the FDA for an extension on the public comment period for the FDA’s Environmental Assessment (EA) of so-called “frankenfish”.

The fish in question are genetically modified, farm-raised salmon engineered by AquaBounty Technologies. They are designed to reach marketable size considerably faster than natural salmon through manipulation of the fish’s genes.

The FDA’s assessment resulted in a Finding of No Significant Impact (FONSI) by the fish on the environment or human health.