Mahi-mahi fishery management varies widely by country and region. The U.S. Atlantic mahi-mahi stock is managed by NOAA Fisheries and the South Atlantic Fishery Management Council in cooperation with the Mid-Atlantic and New England Fishery Management Councils. Measures include permit requirements, and size limits set on the fish in Florida, Georgia and South Carolina.
On the U.S. West Coast, mahi-mahi are managed by NOAA Fisheries and the Pacific Fishery Management Council under a fishery management plan for highly migratory species. Although there are no measures specific to mahi-mahi, fishermen in the longline fishery there must have permits, log books, carry a vessel monitoring system, and allow onboard observers from NOAA. Owners and operators are required to attend annual workshops about protected species. Seafood Watch called mahi-mahi management in the United States moderately effective overall.
In Canada, the stocks are managed by Fisheries and Oceans Canada. A 2016 Seafood Watch report called Canadian management for bycatch species insufficient compared to the United States. Although the mahi-mahi longline fishery in Ecuador has infrequent bycatch, Seafood Watch gave the country a good alternative rating for having a management framework in place to address the impact on mahi-mahi stocks and species of concern.
Other mahi-mahi fisheries lack effective management. Panama has some bycatch measures in place, such as voluntary circle hooks and a national plan for shark preservation, but Seafood Watch called them inefficient to protect vulnerable species. In addition, as of 2016, there were no harvest control rules. Indonesia lacks bycatch management measures for mahi-mahi, and Seafood Watch expressed concern over compliance with other management measures in place there. In Taiwan, although mahi-mahi is managed by the Fisheries Authority of the Council of Agriculture, there are currently no measures. Costa Rica, Guatemala and Peru are engaged in a fishery improvement project, but lack fishery management plans for mahi-mahi.