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) On the journey, she passed so close to the Soviet port that the officers could look through a periscope and see the port only 30 or 40 yards (27 to 37 meters) away. Upon entering the canal, crewmen saw one of "Skipjack"s officers turn off a tracing mechanism so that there would be no written record of the action. Upon returning from this mission, "Skipjack" spent the remainder of 1960 in a restricted yard availability and upkeep. "Skipjack" commenced her 1961 operations by participating in two weeks of type training followed by anti-submarine warfare exercises through August, visiting Mayport, Florida,