Atlantic blue marlin has been overfished for the last 10-15 years, and the most recent stock assessment in 2024 indicates that the stock is still in an overfished state, but is no long subject to overfishing. A rebuilding plan came into force for this stock in 2020. Catches have been above advice in recent years and are likely to be underestimated, and observer coverage is low, so these fisheries are not well monitored. Blue marlin in the Atlantic are mainly landed as bycatch in longline fisheries for tuna and swordfish. While longlining is unlikely to have habitat impacts, it can have a bycatch of highly vulnerable species such as sharks, turtles, and seabirds.Rating last updated January 2025.