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
Skipjack-class submarine Skipjack-class submarine The "Skipjack" class was a class of United States Navy nuclear submarines (SSNs) that entered service in 1959-61. This class was named after its lead boat, . The new class introduced the teardrop hull and the S5W reactor to U.S. nuclear submarines. The "Skipjack"s were the fastest U.S. nuclear submarines until the s, the first of which entered service in 1974. The "Skipjack"s' design was based on the USS "Albacore"'s high-speed hull design. The hull and innovative internal arrangement were similar to the diesel-powered "Barbel" class that were built concurrently. The design of the "Skipjack"s was very different