There is also a profitable shark fishery in the hands of Arabs.
Neither the tunny nor the coral fishery is carried on by the Sardinians themselves, who are not sailors by nature; the former is in the hands of Genoese and the latter of Neapolitans.
Pietro, forms a more or less protected basin, upon the shores of which are several small harbours (the most important being Carloforte), which are centres of the export of minerals and of the tunny fishery.
The shrimp fishery, too, grew during the same period.
The chief part of the population were employed in the oyster fishery.