Skipjack tuna important prey species for sharks and large pelagic fishes and is often used as live bait when fishing for Marlin. It has no scales, except on the lateral line and the corselet (a band of large, thick scales forming a circle around the body behind the head). It commonly reaches fork lengths up to and a weight of . Its maximum fork length is and maximum weight is . Ageing skipjack tuna is difficult, and the estimates of its potential lifespan range between 8 and 12 years. Skipjack tuna is a batch spawner. Spawning occurs year-round in equatorial waters, but
USS Skipjack (SSN-585) frame. In early 1988, "Skipjack" visited St. Croix, Port Canaveral, Florida, Bermuda, and Halifax Harbour, Nova Scotia; the last two port calls conducted during an exercise. In late April, "Skipjack" departed Groton, traveling to the south. During this underway, sister diesel submarine USS Bonefish (SS-582) experienced a disastrous fire. TV news broadcast reports of the fire with film; however, news studio editors failed to identify the submarine televised. Wives of the Skipjack's crew noticed the sub bore strong resemblance to the "Skipjack", leading many to believe it was the "Skipjack" suffering the casualty. "Skipjack" had a change of command during