The coat of arms features a quartered shield. In the first and fourth quarters represents La Sirène, Queen of the Seas, showing a golden crowned mermaid blowing a shell. In the second and third, are three escallop shells, all crowned, arranged in triangular arrangement. These represent the three islands of Navassa, Serranilla and Bajo Nuevo, claimed territories of the Princely Crown, against a red backdrop. The shield is encircled by the sash and badge of the Most Princely& Illustrious Order of La Sirène, and supported on either side by a red-footed booby, each standing on a rock base. The Crown surmounts the coat of arms.
Beneath the shield is a white banner bearing the motto "VIRES • SAPIENTIAE • VIRTUS,” which translates from Latin to "Strength • Wisdom • Virtue." The background behind the shield is set against a depiction of the sea.
The monarch and the state use the Princely Coat of Arms as arms of dominion. Selected purveyors to the royal court can also display the royal insignia. Members of the princely family use the Medium Coat of Arms (without the supporters and banner).