It is a genus of fish, also known as dabs that belong to the Solidae family. They are characterized by having flat body, living at the bottom of the sea and having eyes by the same side.
Edible flatfish, microchirus azevia, oval body of up to 45 cm long with the eyes on the same side of the body. Today I bought acevias in the fish market in the neighborhood. The fishmonger told me that people also call them heartburn.