Soldierfish is a common name for a group of tropical marine fishes belonging to the family Holocentridae. These species are known for their vibrant coloration, spiny dorsal fins, and aggressive behavior. Although soldierfish is a widely recognized name, there are several other synonyms that are used interchangeably for this group. Some of the synonyms for soldierfish include squirrelfish, redfin perch, longspine soldierfish, and roughscale soldierfish. These species are found in various marine habitats, including coral reefs, rocky shores, and sandy bottoms. The soldierfish group is known for its important ecological role in maintaining healthy marine ecosystems, and they are also popular among aquarium enthusiasts.