A large European freshwater mussel of still or slow-moving water, the larvae of which parasitize fish.
- Anodonta cygnea, family Unionidae
- He put his stick into the gap between the two halves of the complete shell and the swan mussel immediately clamped on to the stick.
- In the early hours I had a terrific run on my swan mussel rod that again ripped off yards of line.
- These areas did not seem to suffer with the amount of swan mussels that I had out in front of me.
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