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Invasive Clams, Mussels & Snails

Apple Snail

  • Scientific Name

    Pomacea canaliculata - Visit ITIS for full scientific classification. 

  • Description

    • Usually a large light brown, rounded shell with 5-6 spirals.
    • Can get up to 6 inches in shell size, and have variable coloration.
    • Has a large oval opening, and bright pink egg masses.
  • Habitat
    • Amphibious, but mainly aquatic.
    • Lives in wide variety of environments.
    • Found in swamps, ponds, lakes, rivers, agricultural areas, etc. 
  • Invasion Pathways and Distribution
    • Native to South America.
    • Present in multiple southern California counties.
    • Believed to have arrived in U.S. through intentional introduction(s) for food and/or aquarium trade.
  • Life History
    • Varied herbivorous diet.
    • Individuals are either male or female, with internal fertilization and very high fecundity. 
  • Impacts
    • Feed heavily on aquatic plants.
    • Agricultural rice pest, with rapid reproduction.
    • Outcompetes natives for resources.
  • References and Useful Links

    For references by category and links to other useful AIS sites see our LEARN MORE page.