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
Skipjack (boat) As typical in regional practice the bow features a curving longhead under the bowsprit, with carved and painted trailboards. A small figurehead is common. A typical skipjack is 40 to 50 feet in length. The boats use direct link Edson worm steering gear mounted immediately forward of the transom. The dredge windlass and its motor are mounted amidships, between the mast and deckhouse. Rollers and bumpers are mounted on either side of the boat to guide the dredge line and protect the hull. Due to state laws, the boat has no motor (other than for the windlass). Most skipjacks were