Bigmouth Buffalo

Bigmouth Buffalo are native to North America's Mississippi River drainage system, including Kansas waters.
They are the largest member of the sucker family, capable of reaching over 4 feet in length and 80 pounds, with some individuals documented living over 100 years.
These remarkable fish are unique among suckers as the only species with a terminal, forward-facing mouth adapted for filter-feeding on plankton in open water.
Scientific Name: Ictiobus cyprinellus
- They are the largest member of the sucker family, capable of reaching over 4 feet in length and 80 pounds.
- These remarkable fish are unique among suckers as the only species with a terminal, forward-facing mouth adapted for filter-feeding on plankton in open water.
Fishing in Kansas
What to know
Habitat Distribution
- In Kansas, they inhabit the Arkansas, Kansas, and Missouri rivers along with their larger tributaries, reservoirs, and some natural lakes.
Key Locations
- Focus on major Kansas waterways including the Arkansas River system, Kansas River, Missouri River, and large reservoirs like Cheney, El Dorado, Milford, and Clinton.
Specific Spots
- Target areas with slow current near submerged vegetation, silty bottoms, drop-offs, current edges, overhanging trees, and backwater areas of large rivers.
Bigmouth Buffalo FAQ
Answers from onWater's species guide.
What are the best lures and bait for Bigmouth Buffalo in Kansas?
Use small jigs, inline spinners like Roostertails and Mepps, small flashy spoons, and Sabiki rigs with multiple small hooks that create the illusion of a baitfish school and can trigger feeding responses. Alabama rigs and flasher rigs with abundant flash work well.
What flies work for Bigmouth Buffalo in Kansas?
Try small nymphs, midge patterns, e.g.g patterns, and small Woolly Buggers. Some success has been reported with green marabou algae flies and weighted nymphs that mimic their zooplankton prey.
When is the best time to fish for Bigmouth Buffalo in Kansas?
Bigmouth Buffalo spawn from April through June when water temperatures reach 55-79°F. During this spawning period, avoid targeting them as they are extremely vulnerable and recruitment success is already compromised by habitat changes.
How do you catch Bigmouth Buffalo in Kansas?
Still fishing and drift fishing near the bottom often work best, though they sometimes feed near the surface using short up-and-down movements. Bowfishing is also popular since they often swim near the surface, especially at night under lights, though this method is contributing to population declines.
What do Bigmouth Buffalo eat?
Their diet consists primarily of zooplankton (75%), particularly cladocerans and copepods, supplemented by chironomids (15%), algae, and other invertebrates.
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