Lebranche Mullet
Known locally as lisa or lebranche, Mugil liza is a schooling coastal mullet that supports a small-scale artisanal fishery along the northern Buenos Aires Province coast.
It uses Argentine estuaries as nursery and feeding grounds before migrating north to spawn, making it a seasonal but reliable target for shore-based net fishermen and, increasingly, rod-and-line anglers.
Scientific Name: Mugil liza
Also known as Lisa, Lebranche, Tainha
- Streamlined, torpedo-shaped body with a blunt snout; silvery flanks, darker blue-grey on the back, fading to white on the belly.
- Two widely separated dorsal fins; the first has four stiff spines — a quick ID marker that separates it from similar-looking species in the estuary.
- Common fish run 35–45 cm and around 1–2 kg; larger individuals can reach 70–80 cm and up to 9 kg, though fish over 60 cm are uncommon inshore.
- Thick, rubbery lips and a small mouth adapted for grazing — not the wide gape of a predatory fish.
What to know
Habitat Distribution
- Native to the western Atlantic; in Argentina it reaches its southern limit around 36°S, concentrated along the coast of Buenos Aires Province.
- Primarily found in coastal marine waters, brackish estuaries, and tidal lagoons — Samborombón Bay is a documented nursery area for the southern population.
- Can push into freshwater reaches of estuaries but never strays far from tidal influence.
- Forms large schools that move along the coast, using Argentine and Uruguayan estuaries as feeding and nursery grounds before migrating north to spawn.
Key Locations
- Northern Buenos Aires Province coast — the primary zone for Argentina's small-scale lisa fishery, with seasonal concentrations of migrating schools.
- Samborombón Bay — a documented nursery area for the southern population, where juvenile and sub-adult lisa are present through the warmer months.
- Coastal estuaries and tidal lagoons of Buenos Aires Province — the main feeding and nursery habitat before fish migrate north to spawn.
Specific Spots
- Shallow tidal flats and muddy estuary margins where organic detritus and algae accumulate — this is where lisa spend most of their feeding time.
- Current edges at estuary mouths and tidal creek entrances, where outgoing tides concentrate food and fish stack up before moving.
- Sandy beach gutters and nearshore troughs along the open Buenos Aires coast, especially during seasonal coastal migrations.
- Calm, sheltered bays and lagoon shallows during warmer months when schools are actively feeding close to shore.
Lebranche Mullet FAQ
Answers from onWater's species guide.
What are the best lures and bait for Lebranche Mullet?
Soft bread paste, dough bait, or small pieces of algae on a size 6–10 hook are the most reliable baits, match the fish's natural diet rather than trying to trigger a predatory strike.
What flies work for Lebranche Mullet?
Very small (size 12–16) sparse wet flies or soft-hackle patterns that suggest algae or biofilm; muted olive, brown, and grey tones work better than flashy attractor patterns.
When is the best time to fish for Lebranche Mullet?
Spring and summer (October–March), fish are present in Argentine estuaries and coastal waters, actively feeding and accessible from shore.
How do you catch Lebranche Mullet?
Most lisa in Argentina are taken by artisanal fishermen using ringed gillnets during the seasonal coastal migration. Rod-and-line anglers work estuary margins and beach gutters from shore, using bottom rigs baited with bread paste or dough, often with berley to draw schools within range.
What do Lebranche Mullet eat?
Lisa feed primarily on organic detritus, microalgae, and filamentous algae scraped from mud and sand, not predatory fish. This means lures that imitate baitfish rarely work; small dough baits, bread paste, or fine-particle berley rigs are far more effective for rod-and-line fishing.
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