Also known as
- Gourdhead US
- Redmouth Buffalo US
- Common Buffalo US
- Marblehead US
- Roundhead US
- Brown Buffalo US
- Baldpate US
- Bigmouth Buffalofish US
Identification
Deep-bodied freshwater filter-feeder with elliptical torpedo profile and broad pulling power. Sustained dogged endurance — strong steady fight, no aerials. Sexes similar. Across slow rivers, floodplain lakes, and reservoirs of the central US.
- Brown or coppery back fading through yellow-green flanks to a white or yellow belly
- Variable colour forms including golden and melanistic individuals
- Large upward-facing mouth with thin sucker-style lips nearly level with the eyes
- Long-based back fin extending most of the body length
Where it holds
- Rivers
- Lakes
Behaviour
A true mid-water filter feeder — strains cladocerans, copepods, and zooplankton through long densely-packed gill rakers, unlike bottom-foraging Ictiobus relatives. Often the longest-lived freshwater fish on Earth, with individuals 112+ years. Loosely schools in mid-water through warm months, dropping deep through cold. Peaks 18-25°C (64-77°F), stops below 10°C (50°F). Almost never takes a hook — captures are rare and require fermented dough on near-weightless rigs.
Diet: Zooplankton, Copepods, Cladocerans, Insect Larvae, Algae
How it's caught
Line Fishing
Float Fishing
The most reliable line-fishing approach but still difficult — suspend a single sweetcorn kernel or pinhead-sized fermented dough ball 30-60cm under a tiny waggler in shallow inundated floodplains during the spring spawning push. Critically-balanced bait with effectively no shot pinches and a 2-3kg fluorocarbon hook length is essential — bigmouth detect the slightest resistance and drop instantly. Heavy pre-baiting with sour grain transforms a slow swim.
Bottom Fishing
An infrequent producer. Hair-rigged sweetcorn or scented (anise, garlic, molasses) plant-based dough balls on a size 6-10 hook with the lightest possible inline lead (10-25g). Pre-bait the swim with sour grain, range cubes, or maize 24-72 hours ahead. Braided mainline outproduces mono — these fish detect monofilament stretch under any tension. Watch for a near-imperceptible quivertip nod rather than a slamming take.
Bow Fishing
Far and away the most effective method — bigmouth buffalo congregate in dense surface-feeding aggregations during the spring spawning push, often gulping plankton in 30-90cm of water on flooded grass flats and oxbow shallows. Aim 15-30cm low for refraction; effective range 4-8m. Tournament harvests across the central US (Mississippi River system, Texas reservoirs, Saskatchewan prairie lakes) take large numbers during the spawn window.
