An official website of the United States government.

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Asian Clam

Scientific Name

Corbicula fluminea (O. F. Müller, 1774) (ITIS)

Common Name

Asian clam, Asiatic clam

Native To

Asia, Africa, and Australia (Sousa et al. 2008)

Date of U.S. Introduction

First discovered in 1938 in Washington State (Foster et al. 2012)

Means of Introduction

Possibly imported as a food source (Sousa et al. 2008)


Reproduces in large colonies that can clog waterways and pipes (Foster et al. 2012)

Current U.S. Distribution

Widespread throughout freshwater and some estuarine habitats in the U.S.

Asian clams
Image use policy

Asian clams, adult


Photo by Shawn Liston; Audubon of Florida

Find more images


  • Asian Clams and Native Mussel Growth

    • Apr 22, 2021
    • USDA. FS. Southern Research Station. CompassLive.

    • Native freshwater mussels grew more slowly when invasive Asian clams (Corbicula fluminea) were abundant. The study was led by Wendell Haag, a USDA Forest Service research fisheries biologist. It was published in the journal Freshwater Biology. Mussels live out of sight – buried in the river bottom, eating algae and other small particles of organic material. Mussels are filter feeders and key members of aquatic ecosystems. Unfortunately, mussels are disappearing worldwide, and about 70 percent of the 300 mussel species native to the U.S. are in danger of extinction. Addressing mussel declines is difficult because their causes are mostly unknown.

Distribution / Maps / Survey Status


Selected Resources

The section below contains highly relevant resources for this species, organized by source.

Council or Task Force
  • Fact Sheet: Asian Clam [PDF, 2.21 MB]

    • Jan 2018
    • Alberta Invasive Species Council (Canada).

    • See also: Fact Sheets for more information about individual invasive species, including those listed as "Prohibited Noxious" and "Noxious" under the Alberta Weed Control Act

Federal Government
State and Local Government