Genus Merlangus is a scientific classification for a group of fish in the family Gadidae. Synonyms for this genus include Merla, Merlobius, and Merlucius. These different synonyms refer to different species of fish that are closely related to one another. For example, Merla is used to refer to the whiting fish while Merlucius is used for the hake fish. Another synonym, Merlobius, is less commonly used but still refers to a species within the Merlangus genus. While these names may seem interchangeable, each name denotes a specific species within the Merlangus genus and scientists use them to refer to the different types of fish for clarity.