Clams (Class Bivalvia (Pelecypoda))

Key features:

- 2 hinged shells
- fleshy "foot" (not visible if shells are closed tightly)
- size range:  1/8" - 5"

Clams are easily identified by their two shells which they will draw tightly closed when handled. Count only whole, live clams (those with both shells) in your assessment. Please do not force the shells open to see if you have a live clam. If the shell is tightly closed, you can assume the organism is alive. Note: Clams are usually buried in the stream bottom, so you should kick up the sampling area thoroughly. Also, as indicated by the size range, clams can be quite small and fragile, so look carefully and handle carefully. Do not count empty shells.

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