This species can be recognised by its small, thin, elongate shell, olive green to brown in colour, with darker markings (maybe zig-zag or mottled) posteriorly, and a glossy valve interior. Valve rounded apex (umbo) near anterior end. Shell up to 3 cm across.
This species is native to the north western Pacific, with a natural distribution including Siberia, Korea, China and Japan. Populations are now established in many localities around the world, western USA (1940's), New Zealand (1970's), Mediterranean (1980's), Swan Estuary, WA (1980's) and Victoria (late 1980's) where it is now abundant in Port Phillip Bay. Introductions have been attributed to ballast water and ship fouling. Tolerant of low oxygen concentrations and low salinities helps them to survive in these locations. Predators include diving ducks, oyster catchers and several species of gastropods.
In or on hard or soft substrates, from intertidal areas to depth of 20 m.
Worldwide. In Australia, areas of Western Australia and Victoria.
Plankton or Particles
Introduced to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed