The Family Pomacentridae is a large group of fish that are commonly known as damselfish. These fish are typically found in tropical and subtropical waters, and are known for their bright colors and unique patterns. While the common name for this group is damselfish, there are many other synonyms that people use to refer to this family of fish. Some of the other names that are used to describe the Family Pomacentridae include chromis, demoiselle, sergeant-major, and bluehead. No matter what they are called, these fish are an important part of many marine ecosystems and are beloved by divers and aquarium enthusiasts alike.