Another imprecise fish word. Could be a flounder, brill, four-spot megrim, whiff, Norwegian topnot, turbot or similar.
Some dialect versions: rumbo, rombou (Liguria), arrimbuli, rimbùlu, rumbulu (Sardinia), rumbu, rummo (Puglia), pettine (Campania), liguata, passira, rummule, romolo, rumbulu, tappa (Sicily).
Image by ilmondodigusto