basket clam (Corbicula fluminea) - Species Profile (2024)

Corbicula fluminea (O. F. Müller, 1774)

Synonyms and Other Names: Asiatic clam, golden clam, good luck clam

IMPORTANT NOTE:The taxonomy of Corbicula species needs further revision. Therefore until then, in this database unless otherwise named, all unidentified species of the genus Corbicula collected in the United States are compiled under one name, Corbicula fluminea.

Identification: A small light-colored bivalve with shell ornamented by distinct, concentric sulcations, anterior and posterior lateral teeth with many fine serrations. Dark shell morphs exist but are limited to the southwestern United States. The light-colored shell morph has a yellow-green to light brown periostracum and white to light blue or light purple nacre while the darker shell morph has a dark olive green to black periostracum and deep royal blue nacre (McMahon 1991). Qiu et al. (2001) reported yellow and brown shell color morphs among specimens collected from Sichuan Province in China. The shells of the yellow morphs were straw yellow on the outside and white on the inside, those of brown morphs were dark brown and purple, respectively. Further analyses revealed that the yellow and brown morphs are triploid and tetraploid, respectively.
A separate clonal population of Corbicula has been reported for one location in the Illinois River (Tiemann et al. 2017). Tentatively named Form D, this newest form is pyramidal in shape with weakly elevated ridges; exterior is yellowish-brown with fine rust colored rays radiating out from the umbo; interior is creamy white but the lateral teeth are purple. Form D has a distinctive nuclear ribosomal DNA genotype, but the mtDNA COI haplotype is identical to Form A.

Native Range: The genus Corbicula lives in temperate to tropical southern Asia west to the eastern Mediterranean; Africa, except in the Sahara desert; and southeast Asian islands south into central and eastern Australia (Morton 1986).

Ecology: Corbicula fluminea is a highly plastic and tolerant bivalve capable of surviving in a variety of habitats and environmental conditions. It prefers shallow waters (<3 m deep) of rivers and lakes but is also found in waters ~10 m deep (Mattice and Dye 1975, Patrick et al. 2017). It inhabits sandy or fine gravel substrate and individuals commonly bury themselves in sediment (Paganelli et al. 2018, McDowell and Byers 2019). Temperature is one of the leading factors in the distribution of C. fluminea. Corbicula fluminea can tolerate a wide range of temperatures, but are prone to mass mortality in events of prolonged extreme heat and cold. In both simulated and natural heat waves where water temperatures reach >34?, nearly entire populations of C. fluminea can die off (McDowell et al. 2017). Similarly, near freezing temperatures (<5?) also can lead to mass mortality (Basen et al. 2016). In regions where freezing temperatures are common, C. fluminea typically is found in artificially heated waters such as where cooling water from power plants are released. These regions can act as thermal refugia for C. fluminea to survive winter and act as a steppingstone for future spread (Castenada et al. 2018, Penk and Williams 2019). Notably, the phenotypic plasticity and genotypic adaptations of C. fluminea are allowing it to push the known boundaries of its thermal tolerances. A population living in the cooling waters of a power plant in North Carolina were found to survive in water reaching 38? (Falfushynska et al. 2016). Similarly, populations that have invaded the northern altitudes of eastern North America had nearly double the survivorship (55% vs 26.7%) exhibited by southern populations when exposed to 1? temperatures for 8 weeks (Cvetanovska et al. 2021). Corbicula fluminea lives in fresh and brackish water (0–20 ppt) (Ferreira-Rodríguez and Pardo 2016), with survivorship decreasing as salinity approaches 30 ppt (Crespo et al. 2017). Its salt tolerance makes it likely to survive transport in ship ballast (Coldsnow and Relyea 2018). As a bivalve with a large shell, C. fluminea is reliant on the concentration of calcium in the water. Calcium concentrations <12 mg/L may limit the establishment of C. fluminea (Bollens et al. 2021) as low calcium concentrations increase oxidative stress (Ferreira-Rodríguez et al. 2017).

This species is a filter feeder that removes particles from the water column, including diatoms, flagellates, cyanobacteria, and other microplankton. Using its pedal, or foot, it can also feed on soil microbes and periphyton (Bolam et al. 2019). Corbicula fluminea is consumed by fish, birds, mammals, crustaceans, and turtles but its thick wide shell makes it less palatable than other unionids (Castro et al. 2018a, Castro et al. 2018b, Bradshaw-Wilson et al. 2019, Sterrett et al. 2020).

Corbicula fluminea is a functional hermaphrodite, and incubates its larvae in gill chambers when waters are >15?. It can also reproduce by self-fertilization at different ploidy levels, and is capable of androgenesis, a type of male quasi-sexual reproduction (Hsu et al. 2020). The reproduction of C. flumina is very plastic, and it can respond to the onset of ideal environmental conditions by having multiple consecutive spawning events (Cao et al. 2017). The high reproductive potential of this species has garnered estimates that it only takes one individual to start a new population. Corbicula fluminea can live for around 6 years (Li et al. 2017).

Factors that may affect population density and distribution of Asian clams include excessively high or low temperatures, salinity, drying, low pH, silt, hypoxia, pollution, bacterial, viral and parasitic infections, inter- and intraspecific competition, predators, and genetic changes (Evans et al. 1979, Sickel 1986). Corbicula fluminea has been found in the stomachs of black buffalo (Ictiobus niger) (Minckley 1973); carp (Cyprinus carpio), channel catfish (Ictalurus punctatus), yellow bullhead (Ameiurus natalis), redear sunfish (Lepomis microlophus), largemouth bass (Micropterus salmoides), Mozambique tilapia (Tilapia mossambica) (Minckley 1982); blue catfish (Ictalurus furcatus) (M. Moser pers. comm. 1996; Gatlin et al. 2013); and spotted catfish (Ameiurus serracanthus) (A. Foster pers. comm. 1996). Other predators of Corbicula include birds, raccoons, crayfish, and flatworms (Sickel 1986). Densities of C. fluminea have also been documented to occur by the thousands per square meter, often dominating the benthic community (Sickel 1986).

Means of Introduction: The first collection of C. fluminea in the United States occurred in 1938 along the banks of the Columbia River near Knappton, Washington (Counts 1986). Since this first introduction, it is now found in 47 states, the District of Columbia, and Puerto Rico. Corbicula fluminea was thought to enter the United States as a food item used by Chinese immigrants (Hanna 1966) but there is no direct evidence of that. Alternatively, it may have come in with the importation of the Giant Pacific oyster also from Asia. The mechanism for dispersal within North America is unknown. It is known mostly as a biofouler of many electrical and nuclear power plants across the country. As water is drawn from rivers, streams, and reservoirs for cooling purposes so are Corbicula larvae. Once inside the plant, this clam can clog condenser tubes, raw service water pipes, and firefighting equipment. Economic problems can result from the decreased efficiency of energy generation. Warm water effluents at these power plants make a hospitable environment for stabilizing populations. With humans demonstrated to be the primary agent of dispersal, no large-scale geographic features function as dispersal barriers (Counts 1986; Isom 1986). Current methods of introduction include bait bucket introductions (Counts 1986), accidental introductions associated with imported aquaculture species (Counts 1986), and intentional introductions by people who buy them as a food item in markets (Devick 1991). The only other significant dispersal agent is thought to be passive movement via water currents (Isom 1986); fish and birds are not considered to be significant distribution vectors (Counts 1986; Isom 1986). Migrating blue catfish (Ictalurus furcatus) had shown the potential to pass live adults through their gut when the clam was consumed and digested in cooler water (<21.1?) (Gatlin et al. 2013).

Status: Corbicula fluminea is established in river networks across many states as well as in Lake Erie, Lake Michigan, and Lake Superior (USEPA 2008).

Impact of Introduction:

Summary of species impacts derived from literature review. Click on an icon to find out more...
EcologicalEconomicHuman HealthOther

Environmental: The most prominent effect of the introduction of the Asian clam into the United States has been biofouling, especially of complex power plant and industrial water systems (Isom et al. 1986; Williams and McMahon 1986). It has also been documented to cause problems in irrigation canals and pipes (Prokopovich and Hebert 1965; Devick 1991) and drinking water supplies (Smith et al. 1979). It also alters benthic substrates (Sickel 1986), and competes with native species for limited resources (Devick 1991).

Economic: In the USA, C. fluminea has caused millions of dollars worth of damage to intake pipes used in the power and water industries. Large numbers, either dead or alive, clog water intake pipes and the cost of removing them is estimated at about a billion US dollars each year (Anon., 2005). Juvenile C. fluminea get carried by water currents into condensers of electrical generating facilities where they attach themselves to the walls via byssus threads, growing and ultimately obstructing the flow of water. Several nuclear reactors have had to be closed down temporarily in the USA for the removal of Corbicula from the cooling systems (Isom, 1986). In Ohio and Tennessee where river beds are dredged for sand and gravel for use as aggregation material in cement, the high densities of C. fluminea have incorporated themselves in the cement, burrowing to the surface as the cement starts to set, weakening the structure (Sinclair and Isom, 1961). Isom (1986) has reviewed the invasion of C. fluminea of the Americas and the biofouling of its waters and industries.

Ecological: C. fluminea is consumed mainly by fish and crayfish. An account of the different species which prey on C. fluminea in the USA is given by McMahon (1983). Garcia and Protogino (2005) describe the diet of some native fishes from Argentina (Rio de la Plata) previously not known to feed on C. fluminea. Their results indicate that several local fish species have modified their diet to feed on invasive molluscan species such as C. fluminea. A study of sections of a New Hampshire River pre and post-invasion showed that C. fluminea did not have any impact on local invertebrate denisty or biodiverity (Richardson 2020).

Remarks: Factors that may affect population density and distribution of Asian clams include excessively high or low temperatures, salinity, drying, low pH, silt, hypoxia, pollution, bacterial, viral and parasitic infections, inter- and intraspecific competition, predators, and genetic changes (Evans et al. 1979, Sickel 1986). This clam has been found in the stomachs of black buffalo - Ictiobus niger (Minckley 1973); carp - Cyprinus carpio, channel catfish - Ictalurus punctatus, yellow bullhead - Ameiurus natalis, redear sunfish - Lepomis microlophus, largemouth bass - Micropterus salmoides, Mozambique tilapia - Tilapia mossambica (Minckley 1982); blue catfish - Ictalurus furcatus (M. Moser pers. comm. 1996; Gatlin et al. 2013); and spotted catfish - Ameiurus serracanthus (A. Foster pers. comm. 1996). Other predators of Corbicula include birds, raccoons, crayfish, and flatworms (Sickel 1986). Densities of C. fluminea have also been documented to occur by the thousands per square meter, often dominating the benthic community (Sickel 1986).

Though there is considerable morphological variation in C. fluminea, one study showed that it is possible to identify genotypes in populations based on internal shell color (Hsu et al. 2020).

References: (click for full references)

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Author: Benson, A., Fuller, P., Fusaro, A., Bartos, A., Larson, J., Constant, S., Raikow, D., and Foster, A.

Revision Date: 8/1/2024 Citation Information:
Benson, A., Fuller, P., Fusaro, A., Bartos, A., Larson, J., Constant, S., Raikow, D., and Foster, A., 2024, Corbicula fluminea (O. F. Müller, 1774): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=92, Revision Date: 8/1/2024, Access Date: 8/1/2024

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.

basket clam (Corbicula fluminea) - Species Profile (2024)

FAQs

Basket clam (Corbicula fluminea) - Species Profile? ›

Ecology: Corbicula fluminea is a highly plastic and tolerant bivalve capable of surviving in a variety of habitats and environmental conditions. It prefers shallow waters (<3 m deep) of rivers and lakes but is also found in waters ~10 m deep (Mattice and Dye 1975, Patrick et al. 2017).

What are the characteristics of Corbicula fluminea? ›

Corbicula fluminea (O. F. Müller, 1774)
  • Common Name: Basket clam.
  • Synonyms and Other Names: ...
  • Identification: A small light-colored bivalve with shell ornamented by distinct, concentric sulcations, anterior and posterior lateral teeth with many fine serrations. ...
  • Size: < 50 mm shell length.

What are the predators of the Corbicula fluminea? ›

Other predators of Corbicula include birds, raccoons, crayfish, and flatworms (Sickel 1986). Densities of C. fluminea have also been documented to occur by the thousands per square meter, often dominating the benthic community (Sickel 1986).”

Is Corbicula fluminea edible? ›

The freshwater clam Corbicula fluminea s. l. is an edible freshwater bivalve of economic value in Asia.

What is a basket clam? ›

Corbicula japonica is an edible species of brackishwater clam, a bivalve mollusk in the family Cyrenidae, the basket clams. Its common names include Japanese basket clam, Japanese blue clam, and shijimi (its Japanese name).

What are the benefits of Corbicula fluminea? ›

Freshwater clams (Corbicula fluminea) are a widely consumed shellfish in Asia. A number of in vitro and in vivo studies have found that freshwater clams possess many medical and biological effects, including cholesterol-lowering [1], hepatoprotective [2], and anti-tumorigenic properties [3].

What are the distinguishing characteristics of clams? ›

True clams, in the strict sense, are bivalves with equal shells closed by two adductor muscles situated at opposite ends of the shell, and with a powerful, muscular, burrowing foot. Clams characteristically lie buried from just beneath the surface to depths of about 0.6 metre (2 feet).

Do all bees have Corbicula? ›

Bees in four tribes of the family Apidae, subfamily Apinae have corbiculae: the honey bees, bumblebees, stingless bees, and orchid bees.

What marine animal eats clams? ›

Perhaps the best known predators of cultured clams and oysters are the larger crustaceans such as the blue crab, Callinectes sapidus, the green crab, Carcinus maenas, and the mud crabs. Dsypanopeus sayi and Panopeus herbstii.

What eats giant clams? ›

Juvenile giant clams are food for fishes, octopus, crabs and predatory snails. However, by the time they are three to four years old the shells are about 12 inches (25-30 cm) long, too large and thick to be penetrated by most predators.

What part of a geoduck clam is edible? ›

The geoduck has two parts: a long neck, which pokes out of the shell, sometimes called the siphon, which is often served raw, in a ceviche or crudo preparation, and the much thicker body or breast, which has been sheltered inside the shell.

Can you eat Coquinas? ›

Coquina clams are edible, but consumers should follow the Florida Department of Health seafood safety guidelines and only consume shellfish collected from areas open to harvesting, which can be found on Florida Department of Agriculture and Consumer Services website.

Are purple clams edible? ›

Also known as varnish, mahogany, or just plain old “purple clams,” these clams are gorgeous, plump, and juicy. Unless you find an albino clam, expect dramatic purple shells. Also be prepared for the occasional tiny (and delicious) pea crab. (If you have a crab allergy, these are not the clams for you!)

What is the rarest clam in the world? ›

Hippopus porcellanus, the China Clam, is arguably the rarest species of giant clam living today. It has a very restricted range second only to the Devil Clam, but it is extremely rare where the species has been found.

Do clams feel joy? ›

Although clams are not the brightest of creatures they lack the necessary cognitive facilities needed to feel happy or sad this conclusion has been shown in several studies that were conducted to try and determine if a clam can be happy.

What is the bump on the shell of a clam called? ›

The umbo is the bump on the top of the shell. It leans toward the anterior end. Notice that the siphon is actually made of two siphons. If you cannot see the siphon now, remember to look closely at it after you open the shell. The ventral siphon carries water into the shell and the dorsal siphon removes the water.

What are the unique features of giant clams? ›

The giant clam (Tridacna gigas) is – you guessed it – humongous! It is the largest of all bivalve mollusks in the world, reaching lengths of more than 4 feet, and they can live for nearly a century. Giant clams have multiple vertical folds in their thick, heavy shells that give them their characteristic wavy opening.

What are invertebrates clams characteristics? ›

All clams have two shells joined near a hinge structure with a flexible ligament, and all are filter feeders. Clams also have kidneys, a heart, a mouth, a stomach, a nervous system and an anus. Many have a siphon. There are over 12,000 clam species found throughout the world in many different habitats.

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