The razorback sucker fish could be downlisted from an endangered species to threatened in the next year or so, according to the U.S. Fish and Wildlife Service. This week, environmental groups sent the agency a letter in opposition to the move. The letter argues the razorback sucker is still in trouble, despite recoveries it’s made in the last 30 years, which is when it was first listed as federally endangered. The fish is native to the Colorado River, which is facing historic shortages due to the west’s megadrought.