Marine Emissary is the opposite of Reaper Emissary. While Reaper hunting other player, Marine will protect other player being hunted by Reaper. But if they become Marine Emissary, they only have a duty to hunt Reaper. If they hunt non-Reaper, they will lose their level gradually. This also affect their emissary level if they steal other player treasure. Marine can also help hunting Skelly Ship and get score by assisting or take down Skelly Ship by their own.
Another special ability, Marine Ship can located Red Flare or White Flare on map, their ship is also have 1.2 times faster than any ship