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Dreissena polymorpha

Submitted by Linda Rohleder on Wed, 03/04/2015 - 09:40


Aquatic Animal
Species (Common): 
Zebra Mussel

Dreissena polymorpha: Zebra mussel

Species Identification:

The zebra mussel shell is triangular with a sharply pointed shell hinge edge. It can grow to 5 cm, but most dont exceed 4 cm. The most obvious identifier is the prominent dark and light banding pattern on the shell. The mussel attaches itsel fto hard surfaces by byssal threads that emerge from between the valves through a byssal notch. Zebra mussels tend to attach themselves to hard surfaces along their flat edge, which is different from other similar species.

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