Even before the Supreme Court ruled late last month in Loper Bright Enterprises v. Raimondo, a lawsuit over a herring fishing regulation, Meredith Moore knew the case was never really about fish. Moore, the director of the fish conservation program at the nonprofit environmental group Ocean Conservancy, instead saw the case as a “Trojan horse” that would weaken public agencies’ regulatory power across the board and unleash a wave of lawsuits aimed at unraveling environmental protections.