NEW ORLEANS (AP) — President Obama’s administration allowed fish farming in federal waters of the Gulf of Mexico on Thursday, a move criticized by environmentalists fearful of pollution and threats to wild stocks. The National Oceanic and Atmospheric Administration declined to oppose the plans, but said it would work to make sure future farms in the Gulf are clean and safe. The agency also said it would push to develop a national policy for offshore aquaculture, a practice of raising fish in large pens and cages.