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 tunny fishery is considerable; it is centred principally in the south-west.
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.
Parts of the island are fertile, and the cultivation of vines, and the tunny and sardine fishery, also give employment to a part of the population.
Of sea-fish there are many varieties, the tunny, the sardine and the anchovy being commercially the most important.
In 1902 there were 48 tunny fisheries, employjng 3006 men, and 5116 tons of fish worth 80,000 were caught.
Among the most important are the robalo (Labrax), an exquisite food fish, the tunny, eel, Spanish sardine and mangua.
The coasts are very rich in fish, and the tunny fisheries of the north are one of the principal sources from which the world's supply of tunny is derived.
The alfa and cork industries employ large numbers of persons, as do also the sardine, anchovy and tunny fisheries.
The principal exports are olive oil, wheat, esparto grass, barley, sponges, dates, fish (especially tunny), hides, horses, wool, phosphates, copper, zinc and lead.
It had complete control over the Euxine grain-trade; the absence of tides and the depth of its harbour rendered its quays accessible to vessels of large burden; while the tunny and other fisheries were so lucrative that the curved inlet near which it stood became known as the Golden Horn.
It is now a centre of the tunny fishery, and there are manganese mines also.
Wine, fruit, cork, baskets and sumach are exported in small coasting vessels; there are important sardine and tunny fisheries; and boats, sails and cordage are manufactured.
Among the fish may be mentioned the tunny, dolphin, mackerel, sardine, sea-bream, dentice and pagnell; wrasse, of exquisite rainbow hue and good for food; members of the herring family, sardines, anchovies, flying-fish, sea-pike; a few representatives of the cod family, and some flat fish; soles (very rare); Cernus which grows to large size; several species of grey and red mullet; eleven species of Triglidae, including the beautiful flying gurnard whose colours rival the angel-fish of the West Indies; and eighteen species of mackerel, all migratory.
Excellent honey is produced in Malta; at certain seasons tunny-fish and young dolphin (lampuca) are abundant; other varieties of fish are caught all the year round.
Cod, bream, tunny and anchovy are the principal fish taken.
The estimated hauls of tunny fish were 5534 tons, valued at £110,324.
Of its coins the most ancient bear the Phoenician inscription abdrt with the head of Heracles (Melkarth) and a tunny-fish; those of Tiberius (who seems to have made the place a colony) show the chief temple of the town with two tunny-fish erect in the form of columns.
His attributes are the trident and the dolphin (sometimes the tunny fish.) As represented in art Poseidon resembles Zeus, but possesses less of his majestic calm, his muscles are more emphasized, and his hair is thicker and somewhat dishevelled.
Its tunny-fish were famous.
Strabo mentions the existence here of a look-out tower for the shoals of tunny-fish.
Many of the inhabitants are engaged in the carrying trade, while the fisheries on the coast are also actively prosecuted, tunny and anchovies being caught in great numbers.
The majority of these are employed in the sardine and tunny fisheries.
The fishermen and fisherwomen form a quite distinct class of the people; both sexes are noted for their bodily strength, and the men for their bold and skilful seamanship. Tunny and sardines are cured and exported in large quantities, oysters are also exported, and many other sea fish, such as hake, sea-bream, whiting, conger and various flat-fish are consumed in the country.
Colonial development was fostered, and the commercial dependence of Portugal upon induced the king to marry Maria Sophia de Neuberg, Great Britain was reduced, by the formation of chartered companies, the first of which (1753) was given control of the Algarve sardine and tunny fisheries.
Rovigno is the principal centre of the Austrian tunny and sardine fishery.
The Gulf of Quarnero yields a plentiful supply of fish, and the tunny trade with Trieste and Venice is of considerable importance.