Fish nocturnal

Flathead Catfish

Pylodictis olivaris

The undisputed heavyweight of the riverbed, the Flathead Catfish is a master of camouflage and a powerhouse predator. Known for its massive shovel-shaped head and solitary nature, this elusive giant is a prize find for any backyard underwater camera enthusiast.

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Quick Identification

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Size

20–45 inches (50–115 cm) long; typically weigh 10–50 lbs (4.5–22.7 kg), though record specimens exceed 120 lbs (54 kg)

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Colors

Mottled olive-brown to yellowish-gold on top with a creamy white or pale yellow belly; younger individuals are usually more darkly pigmented

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Key Features

Broad, flattened head with small eyes positioned on top
Protruding lower jaw that extends past the upper jaw
Squared-off or slightly rounded tail fin, never deeply forked
Long, sensitive barbels (whiskers) around the mouth

When You’ll See Them

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Activity pattern nocturnal

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Peak hours 10 PM - 4 AM

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Season May-September

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Diet A strict carnivore that prefers live prey; hunts sunfish, shad, carp, crayfish, and smaller catfish using a powerful suction-gulping strike.

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Habitat Deep, slow-moving pools of large rivers, turbid lakes, and reservoirs, almost always near heavy cover like fallen trees or brush piles.

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Behavior

The Flathead Catfish is a solitary and highly territorial apex predator of the river bottom. Unlike many other catfish species that scavenge for food, the Flathead is an aggressive hunter that prefers to stay hidden during daylight hours. They typically claim a 'home' within deep pools, submerged logs, or rocky crevices, remaining nearly motionless and using their mottled skin as perfect camouflage against the riverbed.

As a nocturnal species, their behavior changes dramatically once the sun sets. They emerge from their woody hideouts to patrol shallower flats and shorelines in search of prey. Because they are top-tier predators, they are generally wary of human activity and loud vibrations in the water, making them a challenging but rewarding species to observe in their natural habitat.

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Camera Tips

Capturing a Flathead Catfish on an AI-powered camera requires an underwater deployment, as these giants rarely break the surface. To find them, look for 'snags'—areas with heavy submerged timber or large boulders in deep water. Secure your camera to a weighted tripod or a submerged post, positioning the lens 12 to 18 inches above the bottom. Angling the camera slightly downward toward a sandy or silty clearing adjacent to cover will provide the best view as the fish emerges to hunt at dusk.

Lighting is the biggest challenge when filming 'mudcats.' Since they live in murky water and are active at night, standard white lights often cause backscatter, where the light reflects off silt and creates a blinding glare. Use high-intensity infrared (IR) or 'no-glow' LEDs. These are invisible to the fish and will penetrate the turbidity much better, allowing you to see the fine details of their barbels and mottled skin patterns without scaring them away.

To draw a Flathead into the frame, traditional 'stink' baits used for other catfish rarely work. Instead, try placing a mesh bait bag filled with fresh, oily fish like cut shad or herring just out of the camera's view. The scent trail will pique the interest of a nearby Flathead, leading it to investigate the area. If your backyard setup includes a dock, mounting the camera near the pylons is a high-percentage strategy, as these structures act as artificial reefs for the Flathead's favorite prey.

Finally, check your camera settings for high-definition video with a high frame rate. Flatheads move with a slow, powerful grace, but their strike is lightning-fast. A higher frame rate (at least 60fps) will allow you to see the incredible mechanics of their protruding jaw when they investigate a scent. Since underwater maintenance is difficult, use an external battery pack and a high-capacity SD card to ensure you don't miss the action during their peak summer activity months.

Similar Species

Species that look similar or are commonly confused with Flathead Catfish.

Channel Catfish

Has a deeply forked tail and a protruding upper jaw, unlike the Flathead's square tail and protruding lower jaw.

Blue Catfish

Features a forked tail and a more slate-blue color without the heavy mottling seen on Flatheads.

Bullhead Catfish

Much smaller in size and typically lacks the significantly flattened head and aggressive underbite of the Flathead.

Frequently Asked Questions

Flathead Catfish are primarily nocturnal, meaning they are most active during the night. They usually begin hunting shortly after sunset and remain active until the early morning hours, spending their days tucked away in deep, dark cover.

If your property borders a river or lake, you can attract Flathead Catfish by providing 'structure' like submerged logs or rock piles. Because they prefer live prey, maintaining a healthy population of smaller baitfish or using fresh, oily cut bait near your camera site is the best way to lure them in.

Unlike the Channel Catfish which may scavenge, the Flathead Catfish is almost exclusively a live-prey hunter. Their diet consists primarily of other fish such as sunfish, perch, shad, and even other catfish, as well as large crayfish.

Yes, they are quite common in suburban areas that have large, slow-moving rivers or reservoirs. They are often found hiding under residential docks or near bridge pilings where they can find both cover and an easy supply of prey fish.

The easiest way to distinguish them is by the jaw and tail. The Flathead Catfish has a lower jaw that sticks out farther than its upper jaw (an underbite) and a squared-off tail, whereas the Channel Catfish has a deeply forked tail and an upper jaw that overlaps the lower one.

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