Jack - Threadfin

Max length : 60.0 cm TL male/unsexed; common length : 30.0 cm TL male/unsexed

Kagami Ulua or Alectus Indica

Adults are found in oceanic waters.

Body compressed and sub-oval in juveniles, oblong in adults; dorsal profile of snout slightly oblique, then abruptly vertical over anterior edge of premaxilla; lobes of second dorsal and anal fins very long; ventral part of chest scaleless up to origin of pectoral fins; body silvery blue with yellow golden highlights; dorsal side of operculum with a black spot; base of second dorsal fin membranes with small black spots. However, when small, the Threadfin Jack has stunningly graceful, streaming dorsal, pectoral and ventral fins and is one of the most beautiful of the larger Hawaiian carnivores. Unfortunately, as it matures, the fins assume more typical proportions.

Summary of Distribution: Eastern Pacific: southern Baja California, Mexico to Ecuador and the Galapagos Islands.
Note: Distribution range colors indicate degree of suitability of habitat which can be interpreted as probabilities of occurrence (fishbase.org)