Details
Caranx ignobilis
The giant trevally is a powerful predator moving between reefs and open water in the Indian and Pacific oceans. It is active across day and night and shifts between solitary and loose-group life.
Map: Ecoregions 2017 © RESOLVE (CC BY 4.0) · Natural Earth (PD)
It uses reef edges, lagoons, steep coastal drop-offs, and open water. Juveniles enter shallow bays and lagoons, while adults range more widely offshore.
Length is about 70-170 cm and weight about 10-80 kg. A deep silver-gray body, large head, and strong tail mark this heavy jack; adults may appear dark.
It patrols fast and may gather loosely where prey is concentrated. Reef edges and current breaks help it drive or intercept fleeing fish.
It is carnivorous, eating fish, crustaceans, and cephalopods. Sudden acceleration and a robust body let it overtake prey in open water or near cover.
Spawning occurs around ocean-facing reef areas, with eggs and larvae dispersing in currents. Young fish grow in shallower, more sheltered habitats.
Its status is listed as Least Concern. It is a prominent coastal predator and sport fish, though local pressure on large adults can be noticeable.
