Blue Ocean Institute


Some problems exist with this species' status or catch methods, or information is insufficient for evaluating. Grouper, Gag – US These fish contain levels of mercury or PCBs that may pose a health risk to adults and children.

In US waters, Gag Grouper are found in the South Atlantic and Gulf of Mexico regions, being moderately abundant along the Atlantic coast but overfished in the Gulf. Similar to other grouper species, Gag Grouper are protogynous hermaphrodites beginning their lives as females and becoming males as they grow larger. Females typically mature after three years and transition to males by 11 years of age.

They are primarily caught with handlines, which causes minimal impact to the seafloor and results in moderate levels of bycatch.

Full species report here.

This fish may have high levels of mercury that could pose a health risk to adults and children. More info here about mercury in grouper. Check out our mercury in seafood section.