Skipjack tuna addition, skipjack's livers were tested globally for tributyltin contamination. TBT is an organotin compound introduced into marine ecosystems through antifouling paint used on ship hulls, and has been determined to be very toxic. About 90% of skipjack tested positive for contamination, especially in Southeast Asia, where regulations of TBT use are less rigorous than in Europe or the US. Skipjack tuna is used extensively in Japanese cuisine, where it is known as . Besides being eaten seared () and raw in sushi and sashimi, it is also smoked and dried to make katsuobushi, the central ingredient in dashi (a common
USS Skipjack (SS-184) and overhaul. After returning to Pearl Harbor, "Skipjack" got underway for her tenth and final war patrol, conducted in the Kuril Islands area. During this patrol, she damaged an enemy auxiliary and attacked a Japanese destroyer without success. On 11 December, she returned to Midway Island and then continued on to Ulithi. She then sailed to Pearl Harbor for refit; and got underway on 1 June 1945 for New London, Connecticut, and duty training submarine school students. "Skipjack" was later sunk as a target vessel in the second atomic bomb test at Bikini Atoll in July 1946 and was later