At the present day, the first place is given to the scarus,2405 the only fish that is said to ruminate, and to feed on grass and not on other fish. It is mostly found in the Carpathian Sea, and never of its own accord passes Lectum,2406 a promontory of Troas. Optatus Elipertius, the commander of the fleet under the Emperor Claudius, had this fish brought from that locality, and dispersed in various places off the coast between Ostia and the districts of Campania. During five years, the greatest care was taken that those which were caught should be returned to the sea; but since then they have been always found in great abundance off the shores of Italy, where formerly there were none to be taken. Thus has gluttony introduced these fish, to be a dainty within its reach, and added a new inhabitant to the seas; so that we ought to feel no surprise that foreign birds breed at Rome.
The fish that is next in estimation for the table is the mustela,2407 but that is valued only for its liver. A singular thing to tell of—the lake of Brigantia,2408 in Rhætia, lying in the midst of the Alps, produces them to rival even those of the sea.2409