description Faucet Snail (Bithynia tentaculata) Overview
Bithynia tentaculata, the faucet snail, is a small freshwater gastropod in the family Bithyniidae. Native to Europe, it has a coiled shell and an operculum, or trapdoor, that closes the aperture; it was introduced to North America and is established in parts of the Great Lakes, northeastern states, and western inland waters. The snail competes with native mollusks and serves as an intermediate host for trematodes that can cause fatal disease in ducks and coots. [Minnesota Department of Natural Resources](https://www.dnr.state.mn.us/invasives/aquaticanimals/faucet_snail/index.html)
help Faucet Snail (Bithynia tentaculata) FAQ
Why is Bithynia tentaculata called the faucet snail?
The name refers to its small freshwater snail form, not to a special association with plumbing. Bithynia tentaculata is native to Europe and has become established in parts of North America, including the Great Lakes region.
How does the faucet snail survive in cold freshwater?
It has an operculum, a hard trapdoor that closes the shell opening when the animal withdraws. This structure helps protect the snail from drying, predators, and difficult conditions.
Where can faucet snails be found in North America?
Introduced populations occur in parts of the Great Lakes and other freshwater areas. They live in lakes, rivers, and streams where submerged surfaces provide food and shelter.
Can the faucet snail carry parasites?
Yes. Faucet snails are known intermediate hosts for some trematode parasites, including parasites associated with waterfowl. Their importance depends on the local parasite cycle and should not be assumed from simply finding a snail.
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