Fish Identification Photos: Longjaw Leatherjack, Bigjaw Leatherjack, Oligoplites altus: The Longjaw Leatherjack is one of the smallest and seldom seen members of the Carangidae or Jack Family found in Mexican waters. It is characterized by its overall “jack-like” appearance, relatively broad body predominantly silver in color, yellowish belly, and yellow caudal and pectoral fins.

The upper jaw of the Longjaw Leatherjack extends beyond the rear edge of the eye. The Longjaw Leatherjack can be easily confused with the Shortjaw Leatherjack, Oligoplites refulgens (more aerodynamic, with jaw extending only to the pupil of the eye) and the Yellowtail Leatherjack, Oligoplites saurus inornatus (longer jaw with clear anal and dorsal fins and a yellow caudal fin).

The Longjaw Leatherjack is pelagic and found inshore over sandy beaches in all Mexican waters south of Guerrero Negro, including the Sea of Cortez and mainland Mexico, but it appears to be absent around the oceanic islands. It is relatively more common in the upper Sea of Cortez.

The Longjaw Leatherjack is found in the first 100 feet of the water column over all types of terrain. It is reported to reach a length of 18 inches, but is more common at 14 inches. It's dorsal and anal spines are reported to be venomous, and should be avoided. It is viewed by locals in southern Baja California as a virtually unknown species.

Longjaw Leatherjack, Bigjaw Leatherjack, Oligoplites altus: They are common in the estuaries and surf and are excellent fighters and jumpers on light and fly tackle. I have caught them as far south as Kino Bay. One must take care in handling them as the dorsal and anal spines are venomous and cause quite an aching sting. They lack scales and the skin feels like wet leather, and the mouth is relatively huge, hence the name. I do not care for them much to eat however, so all are released. Description and photo courtesy Neff Nash