Saltwater · Summer and fall peak in the Gulf; a warm-season fish everywhere
Largehead Hairtail
Trichiurus lepturus
The hairtail is a ribbon of living chrome — a fang-mouthed night hunter that feeds half of East Asia and turns up, as the cutlassfish, in the Gulf of Mexico.
Seasons · Peak
Identifying features
- Impossibly long, flattened ribbon of bright mirror-silver
- No scales and no tail fin — the body tapers to a fine whip-like point
- Long dorsal fin running nearly the whole body length
- Large mouth armed with fang-like teeth; big eyes for night feeding
Habits
- Deep by day, rising toward the surface at night to hunt small fish and shrimp
- One of the world's top commercial fish by volume — China, Korea and Japan land it in huge quantities
- The same species appears in the western Atlantic as the Atlantic cutlassfish, taken occasionally in the Gulf of Mexico
- Fiercely predatory despite its fragile look — handle the teeth with care
Distribution
Where to find them
- Night-lit piers and bridges across its Asian range
- Open water over 50-100 m by day, rising at night
- Gulf of Mexico rigs and channels for the Atlantic form
Where they live
How to catch them
Night fishing under lights Shore
Rig: Float or free-lined bait strip fished in the lit water at piers and bridges
Bait/lure: Fish and squid strips, small live fish
Key tip: Hairtails slash baits to pieces — use a short wire trace and strike quickly.
Deep jigging by day Boat
Rig: Slow-pitch jig worked through the depths by day, glow lures after dark
Bait/lure: Slow-pitch jigs, glow assist lures
Key tip: Find the depth of the school on the sounder and keep the jig in it.
Best baits & lures
Baseline setup
- Rod: Light boat or pier rod
- Line: 10-20 lb braid or mono
- Terminal: Wire traces, slow-pitch jigs, float rigs
Recommended gear for this species
Rod · Best value
9' 5-weight fly rod outfit
≈ US$180-260
Covers chironomid lakes and small rivers with one setup.
Flies · Budget
Chironomid assortment (30 patterns)
≈ US$25-40
Chironomids are 60% of a lake rainbow's diet in spring.
Picks come from our rule library — never paid placements. Prices are guides; affiliate links may earn us a commission.
Typical size
Common 1-3 lb at 2-3 ft long; large fish to 7 lb and 5 ft
On the table
Excellent — soft, fine white flesh with a single row of bones that lifts out cleanly; a staple across East Asia.
Similar species
Regulations vary by area and can change in-season — always check the official rules for your area before you fish. Regulations guide →
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