Shimano Butterfly Flat-Fall Jigs Size 350g

The Shimano Butterfly Flat-Fall Jig 350g is purpose-built for West Coast anglers targeting big bluefin tuna, ling cod, and large pelagics. Its center-balanced design causes the jig to fall horizontally with a wide, wobbling action — staying in the strike zone longer than a traditional butterfly jig and triggering reaction strikes from fish that won't chase a fast-moving lure.

The Flat-Fall Advantage

Most jigs fall nose-down and exit the strike zone fast. The Butterfly Flat-Fall is center-balanced, so it falls horizontally in a slow, erratic wobble that mimics a dying baitfish. That horizontal fall keeps the jig in front of fish longer on every drop — and that extra hang time is often the difference between a bite and a miss.

Why Standard Jigs Miss the Mark on Big Tuna

Big bluefin and ling cod aren't always in a chasing mood. A fast-falling vertical jig blows through the zone before a reluctant fish commits. The Flat-Fall's slow, horizontal wobble gives suspended fish time to track, react, and eat — making it one of the most effective jigs in the spread when fish are marking but not biting aggressively.

Unrigged for a Reason

The Butterfly Flat-Fall 350g ships unrigged so you can match the hook setup to the class of fish you're targeting. For big bluefin, go with a heavy assist hook like the Mustad J-Assist 2 or BKK SF Deep. For ling cod and mixed-species jigging, the Mustad J-Assist 1 or BKK SF Reef Master are proven choices. Choosing the right hook is critical — don't leave it to chance.

Recommended Assist Hooks:

• Mustad J-Assist 1
• Mustad J-Assist 2
• BKK SF Reef Master
• BKK SF Deep

The Right Pick If...

• You're targeting big bluefin tuna on the West Coast
• Fish are marking but not committing to fast-moving jigs
• You want a jig that stays in the strike zone longer on the fall
• You're jigging deep structure for ling cod or large rockfish
• You prefer to rig your own hooks for the specific class of fish you're targeting

Best Fishing Techniques

• Free-spool drop — drop to the bottom, crank up 30 feet, then free-spool and let the jig fall on a slack line; the horizontal wobble does the work
• Cast and fall — cast the jig, free-spool as it sinks, wait for the bite, then jerk and repeat; deadly on surface-feeding bluefin
• Slow pitch jigging — use short, rhythmic lifts to keep the jig in the zone and trigger strikes from suspended fish
• Deep structure jigging — work the jig along the bottom for ling cod and large rockfish holding on structure

Best Conditions

• Offshore West Coast — bluefin tuna grounds from San Diego to Monterey
• Deep water structure — ling cod and rockfish on rocky bottom and ledges
• When fish are marking on sonar but not responding to faster presentations
• Calm to moderate conditions where a slow, deliberate fall is most effective

Best For

• Species: Bluefin Tuna, Ling Cod, Yellowfin Tuna, Large Rockfish, Yellowtail
• Techniques: Free-spool drop, cast and fall, slow pitch jigging, deep structure jigging
• Rigging: Unrigged — pair with heavy assist hooks matched to your target species

Key Features

• Center-balanced design — falls horizontally with a wide, erratic wobble
• Longer strike zone — stays in front of fish longer than nose-down jigs
• Unrigged — customize your hook setup for the specific class of fish you're targeting
• 350g weight — designed for deep water and strong current conditions
• Available in Chartreuse White, Super Glow, and Zebra Glow
• Built by Shimano for West Coast offshore conditions

Models & Specs

Tackle Express Tips

• Match your hook to the fish: For big bluefin (100+ lb class), go heavy — Mustad J-Assist 2 or BKK SF Deep. For ling cod and mixed-species jigging, the Mustad J-Assist 1 or BKK SF Reef Master give you the right balance of strength and hook gap.
• Super Glow and Zebra Glow shine at depth: In deeper water or low-light conditions, the glow colors charge quickly under a light source and stay visible in the water column — giving fish a visual target when natural light fades.
• Let the fall do the work: Resist the urge to jig aggressively. The Flat-Fall's action is in the drop — free-spool on a slack line and let the horizontal wobble trigger the bite. Most strikes happen on the fall, not the retrieve.

FAQ

Why does the Butterfly Flat-Fall come unrigged?
Shimano designed the Flat-Fall unrigged so anglers can match the hook setup to the specific class of fish they're targeting. A 30 lb bluefin needs a different assist hook than a 150 lb fish. Rigging your own hooks gives you full control over hook size, strength, and position for the conditions you're fishing.

What's the difference between the Butterfly Flat-Fall and the standard Butterfly jig?
The standard Butterfly jig falls nose-down with a darting action. The Flat-Fall is center-balanced, so it falls horizontally with a wide, slow wobble — staying in the strike zone longer and triggering strikes from fish that won't chase a fast-moving jig. The Flat-Fall excels when fish are marking but not biting aggressively.

Which color should I choose?
Chartreuse White is a proven all-around color in clear water and bright conditions. Super Glow and Zebra Glow are best for deeper water or low-light situations where the glow finish gives fish a visible target. Carry all three and let the fish tell you what they want on the day.