In a nutshell, here’s the convoluted but important story surrounding federal protection for Yellowstone cutthroats: In 1998, the US Fish and Wildlife Service determined that a request to list the species as threatened under the Endangered Species Act lacked substantial information. Conservation groups sued, and in late 2004 a judge ordered the USFWS to do a 12-month status review. Earlier this year, after said review, the agency denied the trout special protection. Now, three conservation groups say they’re suing again, arguing that “It’s well known and acknowledged that the species has declined and is facing a multitude of threats.”