With the research that went into the Fish and Wildlife Service's 86-page review, the agency should take the next step and list the grayling as endangered, he said. "It seems like a terrible waste of resources. They've done the work to say it warrants listing, but instead of doing that, they've delayed," Greenwald said. The fish exists in southwest Montana, Alaska and Canada. The Montana population was first recognized as a candidate for protection in 1982, and the status was reaffirmed in 2004. In 2007, the agency decided the Montana population of grayling did not merit protection, prompting the groups to sue.