Skipjack tuna commercial tunas, and its population is considered sustainable against its current consumption. Its fishing is still controversial due to the methodology, with rod and reel or fishery options being promoted as ecologically preferable. Purse seine methods are considered unsustainable by some authorities due to excess bycatch, although bycatch is said to be much reduced if fish aggregation devices are not used. These considerations have led to the availability of canned skipjack marked with the fishing method used to catch it. Skipjack is considered to have "moderate" mercury contamination. As a result, pregnant women are advised against eating large quantities. In
USS Skipjack (SSN-585) before returning to Groton. In January 1962, "Skipjack" operated out of Key West, Florida, for two weeks before entering the Portsmouth Naval Shipyard in Maine for extensive overhaul, lasting four and one-half months. Following her return to New London, Connecticut, the submarine operated locally prior to departing in October for duty in the Mediterranean with the Sixth Fleet. During this tour, "Skipjack" participated in various fleet and NATO exercises and visited Toulon, France; and La Spezia and Naples, Italy, before returning to New London. In this year, the Skipjack also conducted the fastest submerged transit of the Atlantic Ocean on