Red mullet

The red mullets or surmullets are two species of goatfish, "Mullus barbatus" and "Mullus surmuletus", found in the Mediterranean Sea, east North Atlantic Ocean, and the Black Sea. Both "red mullet" and "surmullet" can also refer to the Mullidae in general.
Classification.
Though they can easily be distinguished—"M. surmuletus" has a striped first dorsal fin—their common names overlap in many of the languages of the region. In English, "M. surmuletus" is sometimes called the "striped" red mullet. Despite the English name "red mullet", these fishes of the goatfish family "Mullidae" are not closely related to many other species called "mullet", which are members of the grey mullet family "Mugilidae". The word "surmullet" comes from the French, and ultimately probably from a Germanic root "sor" 'reddish brown'.
Cultural impact.
They are both favored delicacies in the Mediterranean, and in antiquity were "one of the most famous and valued fish". They are very similar, and cooked in the same ways. "M. surmuletus" is perhaps somewhat more prized. The ancient Romans reared them in ponds where they were attended and caressed by their owners, and taught to come to be fed at the sound of the voice or bell of the keeper. Specimens were sometimes sold for their weight in silver. Pliny cites a case in which a large sum was paid for a single fish, and an extraordinary expenditure of time was lavished upon these slow-learning pets. Juvenal and other satirists descanted upon the height to which the pursuit of this luxury was carried as a type of extravagance. The statesman Titus Annius Milo, exiled to Marseille in 52 B.C., joked that he would have no regrets as long as he could eat the delicious red mullet of Marseille.