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What Do Bass Eat?
Take one look at a 5-pound largemouth bass and you can tell right away these fish were built for eating. Sure, you could say the same about other freshwater species. But can you fit a grown man's fist inside the mouth of a 5-pound trout or catfish? I didn't think so (and please don't try it). This physiological fact alone says a lot about the eating habits of bass. And while the jaws of a smallmouth don't stretch quite as wide as a largemouth's, both types of bass eat similar prey in similar ways. So, what do bass eat?
It's a question that's as valid in 2023 as it was in 1741, when naturalist William Bartram wrote about Seminole Indians catching Florida largemouth using crude deer-hair flies that were "nearly as large as one's fist." It continues to fuel anglers' imaginations and fill tackle store shelves with an overwhelming supply of bass lures.
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The long-winded and scientific answer to this age-old question will be explained in the sections below. But the short answer is: A bass will eat whatever can fit in its mouth—and then some.
What Do Bass Like to Eat?Whether we're talking about bucketmouths on Toledo Bend Reservoir or bronzebacks on Lake Michigan, the most common bass forage includes:
This knowledge comes from both scientific research and decades of fishing for bass around the country. Todd Driscoll has been a district fisheries biologist for the Texas Parks and Wildlife Department for roughly 25 years. He's a bass expert from East Texas, which is home to some of the most productive largemouth lakes in the country. He's also fished in bass tournaments throughout his career, and these two perspectives have shaped his overall understanding of what bass eat.
Driscoll with a chunky East Texas largemouth ; Driscoll holds up two bass at a tournament weigh-in. "I would classify largemouth bass as opportunistic feeders and extremely adaptable predators," Driscoll says. "And to a large degree, at least in Southern reservoirs, it's understood pretty well what bass eat."
The same generalist description holds true for smallmouth bass, which are found in waters throughout North America.
"I tournament fish all summer long, so it's always been important to me to understand what they're eating," says Jeff Elliott, a Michigan-based federal fisheries biologist with NOAA. "We have a lot of unique [food sources] in the Great Lakes, especially when it comes to smallmouth forage."
While smallmouth and largemouth bass do eat a lot of the same species, there are certain critters each fish prefers.
What Do Largemouth Bass Eat?
Smallmouth and largemouth bass often key in on similar food sources. Adobe stock What Do Smallmouth Bass Eat? Big fish eat little fish, and bass are no different. This means that baitfish are far and away the most important food source for both largemouth and smallmouth bass. The different types and species of baitfish will vary depending on the water body and location. But if we're talking about the large reservoirs and lakes in the South, Driscoll says it's all about shad.
A naturally colored lipped crankbait makes a great shad imitation. Adobe stock "In our area, the primary forage species in terms of biomass is shad-based," he says, adding that threadfin shad and gizzard shad are the two most common species found in East Texas lakes.
Threadfin shad are smaller and more abundant. A typical adult threadfin is around 4 to 5 inches long. Gizzard shad are huge by comparison, measuring between eight to 14 inches as adults. They get even bigger than that, though, and Driscoll has personally seen gizzard shad up to 18 inches long. At that point, he says, "they can outgrow predation," meaning they're too big for most bass to eat. Studies show that bass will eat prey that is as much as 60 percent of their own body size. But bass have been documented trying to take down bigger meals, and dying in the process.
After shad, the next most important forage fish is perch and other small sunfish. Bluegills top this list in many water bodies, but bass will also eat redears, pumpkinseeds, green sunfish, and every other subspecies they can get their jaws around.
Bass will often bite off more than they can chew. AJ Hauser / The Minimalist Fisherman Of course, largemouth and smallmouth bass are also members of the sunfish family. And since we've already established that bass will eat every sunfish species under the sun, bass will also eat each other.
"Cannibalism does happen a lot, and it's usually more focused on year-old, six- to 10-inch fish predating upon the fingerlings after they hatch," Driscoll says. "Male largemouth bass will protect hatched fry for a while, but once those fry scatter on their own, they're fair game. A largemouth bass won't discriminate if they find a one- to four-inch bass."
Moving north to the Great Lakes, Elliott says shad are also one of the most important food sources for smallmouth. He also adds gobies and alewives to the list of regional baitfish that smallies like to eat.
Elliott lips a Michigan smallmouth ; A few smallmouth favorites including gobies, alewives, perch, and smelt. Courtesy of Jeff Elliot Outdoors "Alewives get pretty big, up to six or seven inches, as adults," Elliott says. "They're an invasive, pelagic species here in the Great Lakes … but a really unique thing happens when they come into all these lakes we have on the westside to spawn in June. If you aren't dialed into that, you're in big trouble because the bass really key in on them."
CrayfishThe second-most important food category for bass, according to both Driscoll and Elliot, is crayfish. These armored crustaceans can be found in most lakes and rivers where bass live, and they make up a large portion of a bass' diet.
Growing up fishing rivers in Central Texas, I've caught more bass than I can count (both smallmouth and largemouth) that had little orange claws sticking out of their gullets. Fishing a crawfish pattern slow and deep might not be that exciting, but it's incredibly effective. This is especially true in the springtime when crawdads are emerging from their winter burrows underground.
Amphibians and ReptilesBass love to eat frogs, and these juicy little amphibians are synonymous with warm-water bass fisheries. Bass also prey upon lizards and snakes. While not as common as swimming frogs on most water bodies, lizards do hang out near the water's edge at times.
Throwing a topwater frog is probably the most fun way to catch largemouth bass. Watching a bass blow up on a frog bait will turn a grown adult into a grinning kid every time. Lure companies also make a variety of topwater snake baits, lizards, and other creature baits that will tempt a hungry bass under the right conditions.
Insects and InvertebratesA bass will almost always choose a big meal over a small one. In scientific terms, this all comes down to "caloric expenditure," or the amount of energy it takes for a fish to chase down and grab its prey.
"If you follow bass fishing around the country, a trend that's growing is fishing bigger swimbaits and glide baits, which imitate larger shad and other big baitfish," Driscoll explains. "Once a bass gets to be five or so pounds, it will try to balance its caloric expenditure with what it gains when it feeds. So, if available, they're always going to select those larger prey items."
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The key phrase here is "if available." And there are times when bugs are the most available prey item on the water. As an example, I distinctly remember one morning years ago when I stood on a dock right at sunrise. For at least five minutes, I watched a huge smallmouth sip mayfly after mayfly off the lake's surface during a spinner fall. By the time I returned with my fly rod, the fish was long gone, but I've kept a handful of dry flies in my popper box ever since.
Grasshoppers, beetles, ants, spiders, and cicadas are just as important to the fly-casting bass angler (if not more so) than aquatic insects. You might not catch the biggest fish in the river—but throw a small popper or another floating bug long enough and you will certainly catch bass.
This is also where worms and other invertebrates come into play. Finessing a soft-plastic worm near structure is one of the most effective ways to catch bass, and more big bass have been caught on plastic worms than arguably any other artificial bait. So, bass must eat worms all the time, right? Not exactly.
Bass love to eat soft-plastic worms even though they rarely come across live worms in lakes. Adobe stock The truth is that earthworms and nightcrawlers are landlubbers. Worms will occasionally end up in the water, but they aren't a primary food source for bass. The reason bass eat plastic worms is because they wriggle and move so seductively in the water that they'll often produce a reactionary strike—or what Driscoll calls a "reflex bite." This also ties back to the opportunistic nature of bass, and the fact that they'll eat almost anything they can swallow.
"A buzzbait is a good lure to cover a lot of water and hunt for bass, but what on earth does that mimic naturally? Nothing I can think of really," Driscoll says. "Anglers can take advantage of their aggressive nature to get that reflex bite out of a bass. Think about a plastic worm. How often does a bass naturally come across a large worm? Or a lizard? Almost never, I would say."
Ducklings, Mice, and Other CrittersThere's no question that a bass will eat a duckling whole. This is something that every old-school bass angler knows, and there is ample evidence of this on YouTube and other corners of the internet. There are also plenty of topwater duck lures out there for those who'd rather witness it in person.
The rat lure is another example of an over-sized artificial bait that will catch big bass, and Elliott has seen plenty of mice-eaters in his years chasing smallies in the Midwest.
"I've definitely caught several bass with mouse tails sticking out of their throats," he says. "Call it weird, but if you ever walk along the banks, you'll sometimes see a little mouse or vole jump right into the lake and scurry across—and I imagine that's how they get eaten. If it's small and brown and it moves, I don't think a bass can say no."
As for other larger-than-average prey items, we'll never know for certain the biggest thing a bass has ever eaten. Still, there are plenty of anecdotes out there, and I've even heard of largemouth bass eating baby alligators.
"There's credence to all of it. Ducklings might not be frequent [prey] but that absolutely happens," Driscoll says. "There's also no reason why a seven- to eight-pound bass wouldn't try to eat a baby alligator. When they're ready to eat, they're gonna eat whatever presents itself and is small enough that they can digest. It's really just that simple."
What Do Striped Bass Eat?Striped bass living in saltwater are a whole 'nother animal as the ocean provides an even more diverse buffet of prey items. Still, their diet mostly revolves around saltwater baitfish such as menhaden, bunker, and herring. Striped bass will also eat:
Rock bass are a lot like mini smallmouths. They eat many of the same foods as smallmouth bass, including:
White bass have more in common with striped bass than other subspecies of bass. As they grow, they transition from eating microscopic animals to chasing schools of baitfish. Their favorite foods include:
Striped Bass Stocking Reduced At Smith Mountain Lake In 2023
MONETA, Va. (WFXR) — There will be a reduction in the number of striped bass (stripers) stocked into Smith Mountain Lake in 2023.
Striped bass are a sportfish targeted extensively at Smith Mountain Lake, and that fishery is a major economic driver for the Roanoke and Lynchburg regions, accounting for millions of dollars each year.
There is almost no natural reproduction of striped bass in Smith Mountain Lake. The fishery has to be sustained through stocking. The fishery is managed for numbers and for size. On average, more than 300-thousand stripers are stocked into the lake every year. That number will be reduced to 225-thousand in 2023.
There are a variety of factors involved in the decision by the Virginia Department of Wildlife Resources (DWR) to reduce the number of striped bass stocked, but the primary concern involves the growth and health of the striped bass population in the lake.
"Growth has slowed down the last two to three years," said DWR fisheries biologist Dan Wilson.
A primary factor affecting that growth rate is forage. Gizzard shad are a primary food source for stripers and research has shown a correlation between striped bass growth and gizzard shad numbers in Smith Mountain Lake.
The slowdown in growth coincides with a drop in gizzard shad numbers at Smith Mountain Lake. There are a number of reasons for that drop and predation is one of them. By cutting the numbers of a predator like striped bass, gizzard shad would be given a chance to rebound.
"We've been looking at the shad populations for probably the last 23-24 years," Wilson said. "What we see is whenever gizzard shad numbers are really good, striped bass growth is also good."
The decision to cut stocking numbers, even just for one year, is not sitting well with many striped bass guides and fishing-related business owners on Smith Mountain Lake. They are concerned about the impact a reduction will have on fishing in the years to come. Those guides also point to other sources of forage like blueback herring, threadfin shad, and alewives which can be found in Smith Mountain Lake.
However, the science indicates that stripers thrive when gizzard shad are more readily available.
Wilson says fisheries managers learned a very harsh lesson in 2003 when a similar scenario was unfolding at Smith Mountain Lake: "Twenty years ago we had a major fish kill because our stocking rates were really high and we could see the bait was not looking good. The striped bass growth kept declining and we kept stocking the same amount. Eventually, the fish got into such poor health that parasite came into the lake and killed most fish we had and almost all of the larger fish in the population."
Another issue is the explosion of threadfin shad numbers at Smith Mountain Lake. The lake is on the northern edge of the Threadfins' range. They do not do well in colder temperatures, and it was thought they were wiped out years ago during cold snaps on the lake. However, they reappeared in the last five years, possibly because anglers brought them in from other places to use as bait, and they are known to out-compete gizzard shad. A cold winter could take care of the threadfin issue, but until that happens, their numbers are expected to remain high.
Fisheries experts say the population of striped bass in Smith Mountain Lake remains high, and even with the cuts the outlook is good. Survival rates from past stockings have been high, leading to good numbers of catchable-sized fish in the system. Because of that, the impact of the reductions may not be felt very strongly.
Wilson says taking action now will preserve the fishery, and could actually improve it.
"Seeing this kind of thing coming and trying to make corrections along the way is really beneficial."
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