VII. Iceland 36,608 VIII. Faröe 4,949 IX. Rockall 3,430 X. West of Ireland 9,066 XI. Irish Sea 15,743 XII. Southward of Ireland 50,416 XIII. Bristol Channel 8,613 XIV. English Channel 25,238 XV. West of France 25,422 XVI. North of Spain 5,464 XVII. Coast of Portugal 9,997 XVIII. Coast of Morocco 10,499 ------- Total 678,900 ------- *_Excluding Area G, over 200 metres, and the Moray Firth_] TABLE I 1906 1913 1920 White Sea 40·15 44·12 25·45 Iceland 44·22 46·10 58·54 Faröe 31·19 28·19 27·03 Rockall 38·98 39·27 49·53 North of Scotland 25·01 25·76 27·31 North Sea 17·60 14·08 24·94 English Channel 11·36 8·95 25·70 Irish Sea 15·66 11·94 18·79 Bristol Channel 13·15 13·98 26·38 West of Scotland 21·18 28·11 28·17 West of Ireland 21·48 30·22 25·87 South of Ireland 26·97 23·74 26·63 Biscay 15·98 13·22 18·73 Portugal and Morocco 6·55 13·81 19·29 In England and Wales more fish is landed by trawlers than by all other methods of fishing combined. Trawl-caught fish—soles, plaice, turbot, halibut, cod—are much more valuable than fish caught by drift nets, e.g. herring and mackerel. In England and Wales, in 1913, the weight of pelagic fish caught amounted to 389,262 tons, and of demersal fish 418,038 tons. Although the quantity of the demersal fish was, therefore, only little larger than of the pelagic fish, its value was £7,463,003, compared with £2,531,979, the value of the pelagic fish. CHAPTER VII SHELLFISH Shellfish are divided into two classes: Crustacea, including the lobster, crab, shrimp, prawn, and mollusca, including the oyster, mussel, cockle and periwinkle. Shellfish generally abound in comparatively shallow water near the shore. Perhaps the most important members of the crustacea are the various minute, pelagic copepoda, of which incalculable myriads form an important constituent of the plankton in all seas. These copepoda live upon the diatoms and other microscopic, marine vegetable life floating at the surface of the sea. The most important edible members of the crustacea are the lobster and the shrimp.