Definition of flagfish
noun (plural same or flagfishes)
- any of a number of small fish with prominent or boldly marked fins, in particular:
- a colourful freshwater fish with spots and iridescent scales, native to Florida (Jordanella floridae, family Cyprinodontidae). a marine fish with a dark-barred tail, of shallow Indo-Pacific waters (Kuhlia taeniurus, family Kuhliidae).