Yes, up to a point. Missouri's MDC reports that blue catfish shorter than about 8 to 13 inches eat mostly small invertebrates, but once a blue cat passes that size it shifts to eating mostly other fish -- so a bigger cut-bait chunk or a whole small baitfish, fished right on bottom, is the better bet once you're after a genuinely big one.
Why size changes what a blue catfish eats
Missouri's Department of Conservation says a blue catfish as small as 4 inches may already eat some fish, but most of a small blue's diet is still small invertebrates. The switch happens once the fish tops out at roughly 8 to 13 inches: from there on, MDC says it eats mostly fish and larger invertebrates. North Carolina's NCWRC puts the adult diet plainly, calling blue catfish "piscivorous when large" -- fish-eaters, in other words, once they're grown. South Carolina's SCDNR lists the fuller menu for the species overall: clams, snails, aquatic insects, freshwater mussels, fish and plant material. SCDNR's size data shows the ceiling that diet supports -- a typical South Carolina blue runs 20 to 45 inches and 3 to 40 pounds, and the state's record blue catfish weighed 109 pounds 4 ounces.
Match your bait to the fish you're after
Small chunks of cut bait will catch blue catfish all day, but mostly the smaller ones still working through an invertebrate-heavy diet. If you want a shot at a genuinely big fish, scale the bait up: a bigger strip or chunk of cut bait, or a whole small baitfish, closer to what a grown blue is actually hunting. North Carolina's NCWRC says cut gizzard shad is the bait experienced hook-and-line anglers favor above all others for blue catfish, and South Carolina's SCDNR lists fish plainly as part of the adult diet alongside the smaller forage. A bigger piece also simply holds up longer in the water, so it's still worth biting after the smaller fish have picked at it.
Fish it on the bottom, where a big blue is actually looking
Both MDC and NCWRC describe blue catfish feeding on or near the bottom, finding food with their barbels rather than hunting by sight. A bigger piece of cut bait catches more current, too, so it takes more weight behind it to keep that bait down and gliding naturally instead of skating off bottom or dragging to a stop. Dialing in that weight for the current and bottom you're fishing is what keeps a big chunk of shad working instead of hanging up or washing away.
Common mistakes
- Fishing the same small cut-bait size all day regardless of what's biting -- if you're only getting small fish, that's often the bait talking, not the water.
- Undergunning the weight once you size the bait up, so a bigger, heavier piece of shad never gets down to where a big blue is actually feeding.
- Letting a piece of cut bait sit so long it's been picked clean -- check it often, especially once you've scaled up to bigger pieces that take longer for small fish to strip.
Shop the gear
Once you've sized the bait up, you need weight that can keep it on bottom without fighting the current. Katfish Country Dragon Gliders are fisherman designed and field tested for exactly that job -- a 3-pack built by anglers for anglers, with Standard and Extreme Duty options so a bigger piece of cut bait still glides along bottom instead of hanging up. They're dependable, durable and tournament ready: the fisherman's choice for anglers dragging or trolling bigger bait for trophy-class blues, tried and tested and proven on the water, not just on paper. Katfish Country is family-owned, pro-grade and tournament-proven, used by guides and an angler-approved, everyday-value pick for serious catfish anglers -- the best, most reliable way we know to get a bigger bait down to a bigger fish.
Frequently asked questions
What's the best bait size for a trophy blue catfish?
Go bigger than you would for average-size fish -- a large strip or chunk of cut shad, or a whole small baitfish, closer to what a grown blue catfish is actually eating once it passes about 8 to 13 inches and shifts toward a fish-based diet.
What's the most reliable bait for blue catfish in general?
Cut gizzard shad, according to North Carolina's NCWRC, which names it as the bait experienced hook-and-line anglers favor above all others for the species.
Do small blue catfish eat the same things as big ones?
No. Missouri's MDC says blue catfish under roughly 8 to 13 inches eat mostly small invertebrates, while larger fish eat mostly other fish and bigger invertebrates.
Does a bigger piece of bait need more weight?
Generally yes -- a larger piece of cut bait catches more current, so it takes more weight behind it to keep the bait down on bottom instead of skating or dragging to a stop.
Where do blue catfish feed?
On or near the bottom. Both Missouri's MDC and North Carolina's NCWRC describe blue catfish using their barbels to find food there rather than hunting by sight.
Katfish Country. Field tested. Fisherman proven. Tournament ready.