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
Skipjack-class submarine Fleet Reactor) during development. The S5W was used on 98 U.S. nuclear submarines of 8 classes and the first British nuclear submarine, , making it the most-used US Navy reactor design to date. "Skipjack" was authorized in the FY 1956 new construction program and commissioned in April 1959. Each hull cost around $40 million. "Skipjack" was certified as the "world's fastest submarine" after initial sea trials in March 1959, although the actual speed attained was classified. The "Skipjack"s remained the fastest US nuclear-powered submarines until the first of the "Los Angeles" class entered service in 1974. This was due to