09/28/2026
The Other Side of Florida’s Flathead Catfish Story
For decades, Florida's flathead catfish has been discussed primarily through one lens: invasive predator.
Read enough agency reports and scientific studies and you will hear about expanding populations, declining native bullheads, predation, and concern over what flatheads might do to native fish communities.
Those concerns deserve to be studied.
But after spending more than two decades studying flatheads, following their movement across Florida, fishing these rivers myself, and listening to hundreds of experienced anglers who spend their lives on these waters, I believe another side of this story deserves to be told.
Flatheads are not newcomers anymore.
They have become part of many North Florida river systems, and some of those rivers have now supported flathead populations for several decades.
The history alone gives us an opportunity to stop looking only at what happens immediately after flatheads enter a river and start asking a different question:
What does that river look like 20, 30, or 40 years later?
Flatheads were documented in the Apalachicola River by at least the early 1980s, although some historical records place their presence in the drainage even earlier.
The Escambia and Perdido systems have records dating to around 1980.
The first documented Chipola River flathead was collected in 1989.
They were found in the Ochlockonee during the mid-1990s, the Yellow River by the late 1990s, and the Choctawhatchee around 2001 to 2002.
That means some Florida river systems have lived with flatheads for more than four decades.
If flatheads simply destroyed everything in front of them, we should be able to see that clearly by now.
Instead, many of these rivers continue to support healthy and productive sunfish fisheries.
That does not mean nothing changes when flatheads first arrive.
My experience and the observations of many anglers tell a different and more complicated story.
When flatheads first enter a river system that has never had a large predator occupying that particular niche, I believe there can absolutely be an initial shock.
Local sunfish can decline dramatically in some areas.
The prey population has never dealt with flatheads before. Their behavior has not adapted to that new predator pressure. Flatheads learn where the easiest food is located and take advantage of it.
But rivers are living systems.
Over time, prey behavior changes.
Fish redistribute.
They use different habitat.
They become more dependent on shallow cover, flooded timber, sloughs, backwaters, vegetation, roots, and areas where a large flathead cannot hunt as effectively.
Then something interesting begins to happen.
The sunfish come back.
Not only do we continue catching bluegill, redbreast, redear, spotted sunfish and warmouth in these long-established flathead rivers, but many experienced anglers report catching greater numbers of quality fish and larger individuals than they remember from years ago.
The biological research gives us some reasons why that is possible.
Studies of Florida river sunfish repeatedly show how strongly their populations are influenced by flooding, river stage, sloughs, oxbows and floodplain connectivity.
On the Apalachicola, researchers documented strong juvenile bluegill production in connected floodplain habitat. In one Battle Bend comparison, juvenile bluegill made up 6.4 percent of the sampled young-fish community in 2003 and 16.6 percent in 2007.
That does not prove flatheads caused bluegill to increase.
It does prove something important: bluegill were successfully reproducing and recruiting in a river system that had already supported flatheads for decades.
Research on redear in the same system showed that recruitment increased when spring and summer flows connected fish to floodplain habitat.
In the Ochlockonee, studies likewise found that redbreast year-class strength was related to favorable river flows and floodplain conditions.
Bluegill, redear and redbreast were all documented heavily using flooded backwater and forest habitat.
That matters when we talk about fish populations.
A fish disappearing from the main river channel does not necessarily mean that fish disappeared from the river system.
I believe the same mistake has often been made with bullheads.
Some studies documented sharp declines in spotted bullhead catches after flathead numbers increased.
I do not dispute those catches.
What I question is the assumption that lower catches in the main river automatically equal disappearance from the ecosystem.
Experienced fishermen know how fish respond to pressure.
Bullheads have access to sloughs, small tributaries, backwaters, swamps and shallow areas that large flatheads do not use in the same way.
My observations are that many bullheads simply relocate into safer habitat.
There is another important issue involving the way flatheads are sampled.
Low-frequency electrofishing is extremely effective for collecting flathead catfish. In fact, the equipment and pulse rates commonly used in these surveys are specifically effective on catfish.
Florida research has demonstrated that changing pulse rates can change the apparent abundance, size distribution and even species composition of the fish collected.
Therefore, when a report states that flatheads represented 60 or 80 percent of a sample, that does not mean 60 or 80 percent of all fish living in that river are flatheads.
It means flatheads represented that percentage of fish caught using that particular sampling method.
Those are two very different statements.
Recent Florida diet research raises more questions.
In a Chipola River study involving 141 flathead stomachs, crayfish were the most common food item. Forty percent of stomachs contained crayfish. Fish occurred in 23 percent, while identifiable sunfish occurred in only about 1 percent.
Larger flatheads ate more fish than smaller flatheads, as expected, but those results do not support the simple picture of flatheads continuously wiping out bluegill.
And look at the fisheries today.
Florida currently describes the Escambia as supporting big sunfish.
The Choctawhatchee remains known for bluegill, redear and good bream numbers.
FWC describes the Chipola as having plenty of redbreast and spotted sunfish.
The Yellow River continues to support bluegill, redear, spotted sunfish and warmouth.
The Ochlockonee remains recognized for its redbreast fishery.
These are not empty rivers.
They are functioning ecosystems that have now lived with flatheads for decades.
We should also recognize what the flathead itself has become.
It has created an entirely new trophy fishery.
Anglers buy heavy rods, reels, braid, hooks, bait tanks, boats and electronics. They purchase fuel, stay in hotels and campgrounds, eat in local restaurants, hire guides and travel specifically to chase giant catfish.
Florida already understands that a nonnative predator can have recreational value.
The state intentionally stocked butterfly peacock bass in South Florida beginning in the 1980s. Those fish were introduced partly to control exotic forage fish and partly to create a sport fishery.
Today Florida celebrates that fishery, and anglers spend millions of dollars pursuing peacock bass.
Flatheads arrived under different circumstances, and their ecological effects must still be studied honestly.
But recreational value should not suddenly become meaningless simply because the fish arrived differently.
After decades in these rivers, the question should no longer be whether flatheads are native.
We already know they are not.
The better question is what these river systems actually look like today.
From what I have seen, and from what many lifelong anglers on these rivers continue to see, nature has done what nature has always done.
It adjusted.
The flathead found its place.
The prey adapted.
The river changed.
And today we have thriving sunfish fisheries alongside one of the most exciting freshwater trophy fisheries Florida has ever produced.
That side of the story deserves to be studied too.
Glenn Flowers
Owner, Flathead Catfish Hunters
