Providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the United States Fish and Wildlife Service relating to "Endangered and Threatened Wildlife and Plants; Endangered Species Status for the San Francisco Bay-Delta Distinct Population Segment of the Longfin Smelt".

H.J.Res. 78 is a binding joint resolution that aims to nullify a specific regulation issued by the U.S. Fish and Wildlife Service. The rule in question, finalized in July 2024, officially designated the San Francisco Bay-Delta population of the longfin smelt as an endangered species under the Endangered Species Act. By using the Congressional Review Act, this resolution would not only repeal the current listing but also prevent the agency from issuing any "substantially similar" rules in the future without new authorization from Congress.

If enacted, the bill would remove federal protections for the longfin smelt, a small fish native to the San Francisco Bay estuary. Proponents of the resolution argue that the endangered status creates burdensome regulations that restrict water deliveries to California's Central Valley, impacting farmers and local economies. They contend that the listing relies on flawed science and prioritizes environmental interests over human water needs.