The U.S. Supreme Court case Hynes v. Grimes Packing Co., et al., in 1948 revolved around the dispute between the Fish and Wildlife Service (FWS) of the Department of Interior, represented by Regional Director Hynes, and Grimes Packing Company over fishing rights in Alaskan waters. The FWS had issued regulations limiting commercial salmon fishing to certain areas and times to protect salmon populations from overfishing. However, Grimes Packing Co., along with other companies, argued that these restrictions were arbitrary and exceeded the authority granted to FWS under federal law. The Supreme Court ruled in favor of Grimes Packing Co., finding that while Congress had given broad powers to regulate fisheries within Alaska's territorial waters for conservation purposes, it did not intend for those powers to be used arbitrarily or capriciously without regard for economic impact on fishermen or canneries such as Grimes Packing Co.. Therefore, they held that some of the regulations imposed by FWS were indeed beyond its statutory authority.

In the dissenting opinion for Hynes v. Grimes Packing Co., Justice Jackson argued that the majority's decision to allow commercial fishing in Alaska's Karluk River, despite potential harm to salmon populations, was a misinterpretation of federal law and an overreach of judicial power. He contended that Congress had given authority over fishery conservation to administrative agencies like the Fish and Wildlife Service (FWS), not courts. Therefore, he believed it was inappropriate for the Court to second-guess FWS' scientific judgment about how best to protect salmon stocks from overfishing. Furthermore, he disagreed with the majority's view that commercial interests should take precedence over environmental preservation in this case; instead, he asserted that both were important public interests which needed balanced consideration under law.