Pseudochromis fuscus is a species of saltwater fish in the Dottyback family. Dottybacks are generally very bright in color and relatively small, factors which have made them popular among aquarium enthusiasts. Besides their coloration and size, they are probably best known for their aggressive temperament. While many of the more common dottybacks are in the Pseudochromis genus, there are also species in other genera. Common names for this particular species include the Brown dottyback, the Golden dottyback, and the Musky dottyback. The common name “Golden dottyback” is shared with another species of dottyback, the Pseudochromis pseudoplesiopinae. The species name, fuscus, means dark or dusky in Latin.