Nature School Game Contact Blog Project Noah Facebook Project Noah Twitter

A global citizen science platform
to discover, share and identify wildlife

Join Project Noah!
nature school apple icon

Nature School For Teachers - Fall 2020 Launch! visit nature school

Asian clam

Corbicula fluminea


This invasive clam is hermaphroditic and can grow to 2.5 inches across. They can be found in densities of up to 1000 per square meter. They can be easily differentiated from native fingernail clams by the three lateral teeth and two cardinal teeth of their shells.


Small, flowing stream with substrate consisting of sand and large gravel.


At this site, no live clams were seen, but these cast off shells of deceased individuals indicate a population within the stream. No shells found were larger than the coin shown in picture three, with multiple individuals shown for comparison.

Species ID Suggestions

Sign in to suggest organism ID

No Comments

Spotted by

Tulsa, Oklahoma, USA

Spotted on Jun 4, 2013
Submitted on Jun 5, 2013

Related Spottings

Asian clam Asian Clam Asian clam Asiatic clam

Nearby Spottings

Green sunfish Clouded sulpher Mosquito fish House sparrow (female)