Also known as
- Common Jack US
- Jack Crevalle US
- Atlantic Jack US
Identification
A thick deep-bodied Atlantic and Eastern Pacific inshore powerhouse — heavy compressed build with a steep blunt forehead delivering brutal runs and stubborn stamina well beyond the weight class.
- Yellow to dusky fins in adults
- Mostly scaleless chest with a small scale patch before the pectoral fins
- Fleshy eyelid covering the eye
- Strong bony scutes along the rear of the lateral line
- Distinctive black spot on the upper edge of the gill cover and pectoral fin base
Where it holds
- Inshore
- Offshore
- Coral Reefs
- Estuaries
Behaviour
An aggressive schooling diurnal pelagic predator working the upper 50m around reef edges, channels, passes, river mouths, beach structure, and current lines. Hunts cooperatively in fast-moving schools, cornering baitfish (mullet, menhaden, pinfish, croaker, sardines) against structure and producing visible surface boils with diving birds. Most active in 18-28°C (64-82°F) water with peak activity at 24-25°C (75-77°F); large adults often turn solitary.
Diet: Mullet, Menhaden, Pinfish, Croaker, Sardines, Shrimp, Squid
How it's caught
Line Fishing
Spinning
The dominant US East Coast, Gulf, Caribbean, and West African approach — locate boiling surface activity or working birds and cast a 2-4oz bucktail jig, large topwater plug, popper, or 30-60g metal slug into the school and rip it back fast with erratic action. Heavy bucktails and big swimbaits in white-and-chartreuse are signature. 7-8ft heavy spinning rod, PE3-5 mainline, 60-80lb fluorocarbon shock leader.
Live Lining
An equally productive approach during the autumn mullet run and around passes, channels, and inlets — drift a live mullet, pinfish, croaker, menhaden, or large shrimp on a 4/0-7/0 circle hook with 60-80lb fluorocarbon leader free-line or under a small egg sinker around current edges and depth changes. Allow the bait to swim naturally and let the circle hook do the work on the strike.
Trolling
An effective method for locating scattered schools — pull spoons, diving plugs, and skirted lures at 4-7 knots along reef edges, channels, and depth changes. Stagger lines at different depths to find the active feeding zone. Once a school is found, switch to spinning or live-lining for follow-up hookups. PE4-5 trolling tackle, 50-80lb fluorocarbon leader.
Jigging
A productive structure-bound approach — drop a 60-200g metal jig or 2-4oz bucktail over reefs, wrecks, channel edges, and drop-offs in 15-50m and work it with sharp aggressive sweeps. Casting a heavy jig into a surface frenzy and ripping it back fast is equally effective. White and chartreuse are the signature colours. PE4-5 jigging tackle, 60-80lb fluorocarbon leader.
Surf Casting
An accessible US Southeast and Gulf approach — long-cast 30-60g metal slugs, large topwater plugs, or stickbaits from beaches, jetties, and piers when fish push baitfish against the surf zone during the autumn mullet run. Look for diving birds, nervous bait, and visible boils. Best at first and last light. 9-11ft surf rod, PE3-5 mainline, 60-80lb fluorocarbon shock leader.
Fly Fishing
Saltwater Fly
An exciting approach when fish are surface-feeding visibly — cast a 3-6 inch baitfish streamer (Deceiver, EP Baitfish, Crease Fly) or a big popper to a working school and strip fast and aggressively. 10-12wt rod, intermediate or floating WF saltwater line, 30-50lb fluorocarbon shock tippet. Be ready for explosive strikes and bullish runs.
Spear Fishing
Inshore Spearfishing
An opportunistic approach where schooling fish move onto reefs, channel edges, and nearshore structure — stalk slowly using structure for cover in 5-30m and time the shot during a feeding pass. Schooling behaviour distracts the fish but speed makes the window short. 100-110cm gun with double bands and 7.5-8.0mm shaft.
