Percoidean is a term used to describe a group of fish species that belong to the Perciformes order. These fish are characterized by their spiny fins, and are commonly found in both fresh and saltwater environments. There are a number of synonyms for the word percoidean, including perch-like, percoid, and perch-like fish. Other terms that are used to describe percoidean fish include sea bass, snapper, and grouper. Regardless of the term used, these fish are popular among anglers and often feature prominently in cuisine from around the world. Whether you're studying fish biology or just looking to learn more about your favorite fish, percoidean is a term that is worth knowing.