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DOJ Defends ESA Rule Change: What It Means for California Aquaculture Permitting and Habitat Rules

As aquaculture producers across the Golden State navigate complex federal and state frameworks, a major legal battle is unfolding in Washington that could reshape how the Endangered Species Act (ESA) impacts water and land use.

The U.S. Department of Justice (DOJ) has formally filed motions for summary judgment defending the federal administration’s decision to rescind previous regulatory definitions of “harm” under the ESA. At the heart of the litigation is how federal agencies interpret the statutory term “take.” While Congress originally defined “take” through specific direct verbs like hunt, shoot, wound, kill, or trap, prior regulatory interpretations by the U.S. Fish and Wildlife Service (FWS) and National Marine Fisheries Service (NMFS) expanded “harm” to include significant habitat modification or degradation.

The DOJ’s recent filings argue that following the Supreme Court’s landmark Loper Bright decision – which overturned Chevron deference – agencies must adhere to the plain text of statutes rather than stretching administrative interpretations. The government asserts that Congress did not explicitly authorize agencies to regulate broad habitat modification under the guise of the ESA’s “take” prohibition.

What this means for California fish farmers:

For land- and water-based aquaculture operations in California, overlapping federal ESA designations often introduce substantial hurdles for facility maintenance, water intake management, and expansion. While environmental coalitions have launched multiple lawsuits challenging the rule rollback, the DOJ’s defense signals a concerted push by the administration to rein in expansive federal oversight.

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