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Swan mussel

Animal
The swan mussel, Anodonta cygnea, is a large species of freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels. Because of its morphological variability and its wide range of distribution, there are over 500... Wikipedia
Scientific name: Anodonta cygnea
Conservation status: Least Concern (Population decreasing)
Class: Bivalvia
Phylum: Mollusca
Family: Unionidae