Pelagic fish Atlantic Ocean, the Gulf of Mexico and the Mediterranean Sea. The term highly migratory species (HMS) is a legal term which has its origins in Article 64 of the United Nations Convention on the Law of the Sea (UNCLOS). The highly migratory species include: tuna and tuna-like species (albacore, Atlantic bluefin, bigeye tuna, skipjack, yellowfin, blackfin, little tunny, Pacific bluefin, southern bluefin and bullet), pomfret, marlin, sailfish, swordfish, saury and oceangoing sharks, dolphins and other cetaceans. Essentially, highly migratory species coincide with the larger of the "large pelagic fish", discussed in the previous section, if cetaceans are added and some
HMS Skipjack (1889) minesweepers attached to the Grand Fleet, including "Skipjack" were employed on carrying out daily sweeps of the Pentland Firth. In early October 1914, as part of expensive Grand Fleet operations to protect a large convoy carrying Canadian troops across the Atlantic to England, "Skipjack" was led eight minesweeping gunboats on patrols between the Orkneys and the Shetlands. On 27 October, the battleship struck a mine off Tory Island, north-west of Lough Swilly, and despite efforts to tow her to safety, sank later that day. As a result, "Skipjack" together with sister ships and were ordered from Scapa Flow to join