Serranid fish, commonly known as sea bass, are a group of fish found in tropical and subtropical waters. Some synonyms for the word serranid fish include grouper, rockfish, bass, and perch. Grouper is a type of large predatory fish commonly found in coral reefs, while rockfish is a term used for various species of bottom-dwelling fish that live in rocky areas. Bass is a broad term used for many species of freshwater and saltwater fish, while perch are small, freshwater fish with spiny fins. Despite having different synonyms, all types of serranid fish are prized for their delicate flavor and are commonly used in cooking.