Mojarra \Mo*jar"ra\, n. [Sp.] Any of certain basslike marine fishes (mostly of tropical seas, and having a deep, compressed body, protracile mouth, and large silvery scales) constituting the family {Gerrid[ae]}, as {Gerres plumieri}, found from Florida to Brazil and used as food. Also, any of numerous other fishes of similar appearance but belonging to other families.