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 (SS-184) USS Skipjack (SS-184) USS "Skipjack" (SS-184), a "Salmon"-class submarine, was the second ship of the United States Navy to be named after the fish. Her keel was laid down by the Electric Boat Company in Groton, Connecticut, on 22 July 1936. She was launched on 23 October 1937 sponsored by Miss Frances Cuthbert Van Keuren, daughter of Captain Alexander H. Van Keuren, Superintending Constructor, New York Navy Yard. The boat was commissioned on 30 June 1938 with Lieutenant Herman Sall in command. She earned multiple battle stars during World War II and then was sunk, remarkably, by an atomic bomb