Ulua

Ulua is the Hawaiian name for large predatory jacks in the family Carangidae, typically used to describe several species of trevally in the genus Caranx. In Hawaiian waters, ulua usually refers to the larger individuals of species such as the giant trevally (Caranx ignobilis) and the bluefin trevally (Caranx melampygus), though the term can apply to other sizable Caranx species encountered near reefs and shores.

Habitat and range: Ulua inhabit tropical and subtropical Pacific coastal waters, especially around coral reefs, rocky shorelines, and channels. Juveniles frequent lagoon and nearshore habitats, while adults may range farther offshore.

Behavior and diet: They are apex or near-apex predators within their ecosystems, feeding on smaller fish, crustaceans, and cephalopods. Young ulua may form schools; adults are often solitary or in small groups and are known for powerful, sustained runs when hooked.

Reproduction: Spawning occurs in warm months, often offshore or around reefs; eggs are pelagic and larvae drift with currents before settling into reef-associated habitats.

Fisheries and cultural significance: Ulua are prized as sport fish among recreational anglers in Hawaii and other Pacific regions. They support local fisheries and feature in traditional Hawaiian fishing practices. Management measures, such as size limits, bag limits, and seasonal restrictions, are used to regulate harvest and protect stocks.

Taxonomy: Family Carangidae; genus Caranx; several large species are referred to as ulua.