Lesser Amberjack

The Lesser Amberjack is a moderately sized member of the jack family (Carangidae) and one of the smaller species in the genus Seriola, which also includes the much larger Greater Amberjack. It inhabits deeper offshore waters of the western Atlantic, from the southeastern United States through the Gulf of Mexico and Caribbean to Brazil, typically associating with reefs, wrecks, and rocky structure well beyond the shallow shore zone. Superficially similar to its larger relatives, it is often overlooked or misidentified due to its smaller size and deeper habitat preference. It carries no special conservation status, though its offshore, deep-structure habitat means it is less frequently observed by divers than shallow-water jacks.

• Elongated, moderately compressed, fusiform body typical of Seriola
• Bronze to olive-brown back fading to silvery sides
• Faint dark diagonal band running through the eye
• Amber-yellow lateral stripe, often more subdued than in the Greater Amberjack
• Deeply forked tail with dusky yellow tint
• Relatively large eye and steep head profile

Reaches 30-50 cm typically, smaller than the Greater Amberjack, which regularly exceeds 1 m. Best distinguished from Greater and Almaco Amberjacks by its smaller maximum size, proportionally larger eye, and deeper-water habitat.

Lesser Amberjacks live in deeper offshore waters of the western Atlantic, typically over reefs, rocky ledges, and shipwrecks at depths of roughly 18-200 m, well beyond the reach of casual snorkelers or shallow divers. Their range spans from the Carolinas and Gulf of Mexico through the Caribbean to southern Brazil, in warm temperate to tropical waters. Unlike many reef jacks, they rarely enter very shallow inshore areas, instead favoring structure-rich habitat along the outer continental shelf. Juveniles may associate more loosely with drifting sargassum or floating debris before moving to deeper reef and wreck habitats as they mature into adults.

Lesser Amberjacks are moderately social, often forming small to medium loose aggregations around wrecks, reef ledges, and other offshore structure rather than the dense schools typical of shallow jacks. They are active carnivorous predators, feeding on small fish and benthic or midwater invertebrates found near their deep-structure habitat. Spawning is believed to occur offshore in warmer months, with pelagic eggs and larvae dispersing before juveniles settle near cover. As mid-level predators over deep reefs and wrecks, they help control populations of smaller fish and invertebrates while themselves serving as prey for larger pelagic predators, contributing to the trophic structure of deep-shelf reef communities.