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Corbicula fluminea is a species of freshwater clam, also known as Asian
clam, Asiatic clam, golden clam, golden freshwater clam, prosperity clam, and
good luck clam. This clam species is native to Asia, and has been introduced
into many parts of the world, including South America, North America and Europe.
Asian golden clams are the more popular species of freshwater clams today,
as they offer a great choice for hobbyists seeking the "unusual". This
ornamental species introduces a delightful golden coloration to the aquarium and
the opportunity to observe unusual and entertaining behavior. They have the
typical oval-triangular clam shape, with a dorsal "beak" or umbo at the peak of
the shell. The outside of the shell is olive, or yellowish to black-brown in
color, with 1-3 brown/purple colored radial bands and white erosion rings near
the umbo. As they age the periostracum becomes darker in color.
Adult Golden clams are simultaneous hermaphrodites (both male and female)
that are capable of both cross and self-fertilization, so, it takes only 1
individual clam to start a population. Adults can live 3-4 years, and typically
reproduce two times a year, although they may reproduce more often under optimal
situations. A single adult can produce 1000-100,000 juveniles per year. Egg
fertilization is internal and the larval clams are brooded on the qill where
they transform into juveniles in about 4-5 days. Juvenile clams can reach
maturity in 3-6 months.
The Asian Gold Clam will spend most of its time partially buried in fine
substrate on the tank bottom. In most cases the clam will be between half way
and three quarters buried. These clams all behave differently, one may be
content completely burying itself and another only bury half way. Same goes for
movement, one may always be content to stay in one spot, while another may
always be on the move. These behavioral differences can really be interesting to
observe.
The Freshwater Asian Gold Clam is a filter feeder that can help keep
aquarium water clear and clean. By removing uneaten food and detritus from the
water column, the Gold Clam helps maintain water quality and lower nitrate
levels. Clams eat Organic matter suspended in the water, like algae and
bacteria. They do not eat nitrates or ammonia, they will not harm fish, plants,
or other animals. If your tank is cloudy with green water or another color, add
a clam and wait a few days, it should start to clear up.
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