The largemouth bass (''Micropterus salmoides'') is a carnivorous freshwater

gamefish Game fish, sport fish or quarry refer to popular fish pursued by recreational anglers, and can be freshwater or saltwater fish. Game fish can be eaten after being caught, or released after capture. Some game fish are also targeted commerciall ...

in the Centrarchidae ( sunfish) family, a species of black bass native to the eastern and central United States, southeastern Canada and northern Mexico, but widely introduced elsewhere. It is known by a variety of regional names, such as the widemouth bass, bigmouth bass, black bass, bucketmouth, largies, Potter's fish, Florida bass, Florida largemouth, green bass, bucketmouth bass, Green trout, gilsdorf bass, Oswego bass, LMB, and southern largemouth and northern largemouth. The largemouth bass is the

state fish This is a list of official and unofficial U.S. state fishes: __TOC__ Table See also * Lists of U.S. state insignia * Lists of U.S. state animals Notes References Netstate.com state fish tables External links {{state insignia .State ...

of Georgia and Mississippi, and the state

freshwater fish Freshwater fish are those that spend some or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 1.05%. These environments differ from marine conditions in many ways, especially the difference in levels of s ...

of Florida and Alabama.

Taxonomy

The largemouth bass was first formally described as ''Labrus salmoides'' in 1802 by the French naturalist

Bernard Germain de Lacépède Bernard-Germain-Étienne de La Ville-sur-Illon, comte de Lacépède or La Cépède (; 26 December 17566 October 1825) was a French naturalist and an active freemason. He is known for his contribution to the Comte de Buffon's great work, the ...

with the type locality given as the Carolinas. Lacépède based his description on an illustration of a

specimen Specimen may refer to: Science and technology * Sample (material), a limited quantity of something which is intended to be similar to and represent a larger amount * Biological specimen or biospecimen, an organic specimen held by a biorepository ...

collected by

Louis Bosc Louis may refer to: * Louis (coin) * Louis (given name), origin and several individuals with this name * Louis (surname) * Louis (singer), Serbian singer * HMS ''Louis'', two ships of the Royal Navy See also Derived or associated terms * Lewis (d ...

near

Charleston, South Carolina Charleston is the largest city in the U.S. state of South Carolina, the county seat of Charleston County, and the principal city in the Charleston–North Charleston metropolitan area. The city lies just south of the geographical midpoint o ...

. Recent phylogenomic studies, however, place the type locality given by Lacépède as within the range of the Florida bass (''M. floridanus'') and outside that of the largemouth bass. This study concludes that Lacépède's name is the correct binomial for the Florida bass and that the oldest available binomial for the largemouth bass is Cuvier's ''Huro nigricans'', which has a type locality of Lake Huron which is within the range of the largemouth bass.

Description

The largemouth bass is an olive-green to greenish gray fish, marked by a series of dark, sometimes black, blotches forming a jagged horizontal stripe along each flank. The upper jaw ( maxilla) of a largemouth bass extends beyond the rear margin of the orbit. The largemouth is the largest of the black basses, reaching a maximum recorded overall length of and a maximum unofficial weight of . Sexual dimorphism is found, with the female larger than the male. Average lifespan in the wild is 10 to 16 years.

Feeding

The juvenile largemouth bass consumes mostly small bait fish,

scud A Scud missile is one of a series of tactical ballistic missiles developed by the Soviet Union during the Cold War. It was exported widely to both Second World, Second and Third World, Third World countries. The term comes from the NATO reporti ...

water fleas The Diplostraca or Cladocera, commonly known as water fleas, are a superorder of small crustaceans that feed on microscopic chunks of organic matter (excluding some predatory forms). Over 1000 species have been recognised so far, with many more ...

copepods Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (inhabiting sea waters), some are benthic (living on the ocean floor), a number of species have p ...

, small

shrimp Shrimp are crustaceans (a form of shellfish) with elongated bodies and a primarily swimming mode of locomotion – most commonly Caridea and Dendrobranchiata of the decapod order, although some crustaceans outside of this order are refer ...

, and insects. Adults consume smaller fish (

bluegill The bluegill (''Lepomis macrochirus''), sometimes referred to as "bream", "brim", "sunny", or "copper nose" as is common in Texas, is a species of North American freshwater fish, native to and commonly found in streams, rivers, lakes, ponds and ...

banded killifish The banded killifish (''Fundulus diaphanus'') is a North American species of temperate freshwater killifish belonging to the genus ''Fundulus'' of the family Fundulidae. Its natural geographic range extends from Newfoundland to South Carolina, ...

, minnows),

shad The Alosinae, or the shads,Alosinae

, worms, snails,

crawfish Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, mu ...

, frogs, snakes, salamanders, bats and even small water birds,

mammal Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or ...

s, turtle hatchlings, and alligator hatchlings. In larger lakes and reservoirs, adult bass occupy slightly deeper water than younger fish, and shift to a diet consisting almost entirely of smaller fish like

shad The Alosinae, or the shads,Alosinae

, yellow perch,

ciscoes The ciscoes (or ''ciscos'') are salmonid fish that differ from other members of the genus in having upper and lower jaws of approximately equal length and high gill raker counts. These species have been the focus of much study recently, as rese ...

, suckers, shiners, other cyprinids, freshwater silversides, and sunfish (such as bluegill and green sunfish). It also consumes younger members of larger fish species, such as catfish, trout, walleye, white bass,

striped bass The striped bass (''Morone saxatilis''), also called the Atlantic striped bass, striper, linesider, rock, or rockfish, is an anadromous perciform fish of the family Moronidae found primarily along the Atlantic coast of North America. It has al ...

, and even smaller black bass. Among the crayfish species preyed upon include ''

Orconectes difficilis ''Faxonius difficilis'', the painted crayfish, is a species of crayfish in the family Cambaridae. It is endemic to the United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or Americ ...

'', ''

Orconectes harrisonii ''Orconectes'' is a genus of cave dwelling freshwater crayfish, endemic to suitable habitats in the eastern United States. Surface dwelling species, formerly categorised here, were moved to '' Faxonius'' in 2017. Due to their subterranean habit ...

'', ''

Orconectes hartfieldi ''Faxonius hartfieldi'' (previously known as ''Orconectes hartfieldi'') is a species of crayfish in the family Cambaridae. It is endemic to the United States The United States of America (U.S.A. or USA), commonly known as the United Stat ...

'', and '' Procambarus clarkii.'' Prey items can be as large as 50% of the bass's body length or larger. Studies of prey utilization by largemouths show that in weedy waters, bass grow more slowly due to difficulty in acquiring prey. Less weed cover allows bass to more easily find and catch prey, but this consists of more open-water baitfish. With little or no cover, bass can devastate the prey population and starve or be stunted. Fisheries managers must consider these factors when designing regulations for specific bodies of water. Under overhead cover, such as overhanging banks, brush, or submerged structure, such as weedbeds, points, humps, ridges, and drop-offs, the largemouth bass uses its senses of hearing, sight, vibration, and smell to attack and seize its prey. Adult largemouth are generally apex predators within their habitat, but they are preyed upon by many animals while young, including

great blue herons The great blue heron (''Ardea herodias'') is a large wading bird in the heron family Ardeidae, common near the shores of open water and in wetlands over most of North America and Central America, as well as the Caribbean and the Galápagos Isl ...

, larger bass, northern pike, walleye, muskellunge, yellow perch,

channel catfish The channel catfish (''Ictalurus punctatus'') is North America's most numerous catfish species. It is the official fish of Kansas, Missouri, Iowa, Nebraska, and Tennessee, and is informally referred to as a "channel cat". In the United States, the ...

, northern water snakes,

crappie Crappies () are two species of North American freshwater fish of the genus ''Pomoxis'' in the family Centrarchidae (sunfishes). Both species of crappies are popular game fish among recreational anglers. Etymology The genus name ''Pomoxis'' ...

common carp The Eurasian carp or European carp (''Cyprinus carpio''), widely known as the common carp, is a widespread freshwater fish of eutrophic waters in lakes and large rivers in Europe and Asia.Fishbase''Cyprinus carpio'' Linnaeus, 1758/ref>Arkive The ...

, and

American eel The American eel (''Anguilla rostrata'') is a facultative catadromous fish found on the eastern coast of North America. Freshwater eels are fish belonging to the elopomorph superorder, a group of phylogenetically ancient teleosts. The America ...

s. Multiple species of kingfishers and

bitterns Bitterns are birds belonging to the subfamily Botaurinae of the heron family Ardeidae. Bitterns tend to be shorter-necked and more secretive than other members of the family. They were called ''hæferblæte'' in Old English; the word "bittern" ...

feed on this bass, as well. Both the young and adult largemouths are targeted by the

bald eagle The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche as ...

. Notably in the Great Lakes Region, ''Micropterus salmoides'' along with many other species of native fish have been known to prey upon the invasive

round goby The round goby (''Neogobius melanostomus'') is a fish. Defined as a euryhaline bottom-dwelling goby of the family Gobiidae, it is native to Central Eurasia, including the Black Sea and the Caspian Sea. Round gobies have established large non-nat ...

(''Neogobius melanostomus''). Remains of said fish have been found inside the stomachs of largemouth bass consistently. This feeding habit may impact the ecosystem positively, but more research must be conducted to verify this. It is illegal to use or possess live ''Neogobius melanostomus'' as bait in the Great Lakes Region.

Spawning

Largemouth bass usually reach sexual maturity and begin spawning when they are about a year old. Spawning takes place in the spring season when the water temperature first remains continuously above for a sufficient period of time. In the northern region of the United States and Canada, this usually occurs anywhere from late April until early July. In the southern states, where the largest and healthiest specimens typically inhabit, this process can begin in March and is usually over by June. Males form nests by moving debris from the bottom of the body of water using their tails. These nests are usually about twice the length of the males, although this can vary. Bass prefer sand, muck, or gravel bottoms, but will also use rocky and weedy bottoms where there is cover for their nest, such as roots or twigs. After finishing the nest, the males swim near the nest looking for a female to mate with. After one is found, the two bass swim around the nest together, turning their bodies so that the eggs and sperm that are being released will come in contact on the way down to the nest. Bass will usually spawn twice per spring, with some spawning three or four times, although this is not as common. The male will then guard the nest until the eggs hatch, which can take about two to four days in the southern US and Northern Mexico, and slightly longer in the northern part of its native range. Finally, depending on the water temperature, the male will stay with the nest until the infant bass are ready to swim out on their own, which can be about two more weeks after they hatch. After this, the male, female, and newborns will switch to more of a summer mode, in which they then focus more on feeding.

Angling

Largemouth bass are keenly sought after by

angler Angler may refer to: * A fisherman who uses the fishing technique of angling * ''Angler'' (video game) * The angler, ''Lophius piscatorius'', a monkfish * More generally, any anglerfish in the order Lophiiformes * '' Angler: The Cheney Vice Presi ...

s and are noted for the excitement of their 'fight', meaning how vigorously the fish resists being hauled into the boat or onto shore after being hooked. The fish will often become airborne in their effort to throw the hook, but many say that their cousin species, the smallmouth bass, is even more aggressive. Anglers most often fish for largemouth bass with lures such as Spinnerbait,

plastic worm A plastic worm or trout worm is a soft-bodied fishing lure made of elastomer polymer material, generally simulating an earthworm. Plastic worms are typically impaled onto a hook, and can carry a variety of shapes, colors and sizes, awith some are ...

s (and other plastic baits), jigs, crankbaits, and live bait, such as worms and minnows. A recent trend is the use of large

swimbait Swimbaits or swimmers are a loosely defined class of fishing lures that are designed to primarily imitate the underwater swimming motions of baitfishes. History Swimbaits originated in the late 1980s as lures designed to imitate rainbow trout ...

s to target trophy bass that often forage on juvenile

rainbow trout The rainbow trout (''Oncorhynchus mykiss'') is a species of trout native to cold-water tributaries of the Pacific Ocean in Asia and North America. The steelhead (sometimes called "steelhead trout") is an anadromous (sea-run) form of the coasta ...

in California. Fly fishing for largemouth bass may be done using both topwater and worm imitations tied with natural or synthetic materials. Other live baits, such as frogs or

, can also be productive. Large golden shiners are a popular live bait used to catch trophy bass, especially when they are sluggish in the heat of summer or in the cold of winter. Largemouth bass usually hang around big patches of weeds and other shallow water cover. These fish are very capable of surviving in a wide variety of climates and waters. They are perhaps one of the world's most tolerant freshwater fish. The world record largemouth according to the IGFA is shared by Manabu Kurita and George W. Perry. Kurita's bass was caught from Lake Biwa in Japan on July 2, 2009, and weighed Perry's bass was caught on June 2, 1932, from Montgomery Lake in Georgia and weighed . This record is shared because the IGFA states a new record must beat the old record by at least 2 ounces. Strong cultural pressure among largemouth bass anglers encourages the practice of

catch and release Catch and release is a practice within recreational fishing where after capture, often a fast measurement and weighing of the fish is performed, followed by posed photography as proof of the catch, and then the fish are unhooked and returned ...

, especially the larger specimens, mainly because larger specimens are usually breeding females that contribute heavily to future sport fishing stocks. Largemouth bass respond well to

, with a very high survival rate after release, especially if the fish is handled with care and is loosely hooked in the side or top of the mouth. However, if the fish swallows the hook, survival odds greatly decrease. Largemouth bass have a white, slightly mushy meat, lower quality than that of the smallmouth bass,

, yellow perch,

or walleye. Small largemouth, of 10–14 inches, can contain higher quality meat, especially during the spring. Given largemouth bass' prevalence across North America and their accessibility to the everyday angler, largemouth bass are often viewed as an introductory fish. Fishing for largemouth bass can help beginner anglers transition away from traditional "worm on a hook" angling towards fishing with artificial lures and strategies. It is often the case that recreational fishermen become "addicted to fishing" shortly after they make largemouth bass their target species. The cultural implications of largemouth bass are quite significant, as there are even competitions and tournaments specifically targeting largemouth bass in North America.

Invasive species

The largemouth bass has been introduced into many other regions and countries due to its popularity as a sport fish and tolerance to urban environments. It causes the decline, displacement or extinctions of species in its new habitat through predation and competition, for example in Namibia. They are also an invasive species in the Canadian province of New Brunswick, and are on the watch list across much of the far northern US and Canada. In colder waters, these fish are often a danger to native fish fry such as salmon and trout. They have also been blamed for the extinction of the Atitlan grebe, a large waterbird which once inhabited

Lake Atitlan A lake is an area filled with water, localized in a Depression (geology), basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the World Ocean, oce ...

Guatemala Guatemala ( ; ), officially the Republic of Guatemala ( es, República de Guatemala, links=no), is a country in Central America. It is bordered to the north and west by Mexico; to the northeast by Belize and the Caribbean; to the east by H ...

. In 2011, researchers found that in streams and rivers in the Iberian Peninsula, juvenile largemouth bass were able to demonstrate trophic plasticity, meaning that they were able to adjust their feeding habits to obtain the necessary amount of energy needed to survive. This allows them to be successful as an invasive species in relatively stable aquatic food webs. Similarly, a study done in

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

showed that the introduction of both largemouth bass and bluegill into farm ponds have caused increases in the numbers of

benthic The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from ancient Greek, βένθος (bénthos), meaning "t ...

organisms, resulting from the predation on fishes, crustaceans, and nymphal odonates by the bass. The largemouth bass has been causing sharp decreases in native fish populations in Japan since 1996, especially in bitterling fish in Lake Izunuma-Uchinuma.

References

External links

* * * Illustration
plate 45
in Cuvier & Valenciennes (circa 1834), illustration by Werner & Smith. {{Taxonbar, from=Q755105 Largemouth bass Freshwater fish of the United States Fish of the Eastern United States Largemouth bass Symbols of Georgia (U.S. state) Symbols of Mississippi Symbols of Alabama Symbols of Florida Taxa named by Bernard Germain de Lacépède