Head to head
Swan Mussel vs Painter's Mussel
Swan Mussel
VS Painter's Mussel
The swan mussel and the painter's mussel are two of the most common freshwater mussels in the lakes, canals, and rivers of Europe, and they are often found together.
| Swan Mussel | Painter's Mussel | |
|---|---|---|
| Scientific name | Anodonta cygnea | Unio pictorum |
| Relationship | A freshwater mussel whose larvae ride on fish | A freshwater mussel whose larvae ride on fish |
| Size | Can reach up to about 20 cm long | Usually 6 to 10 cm long |
| Shell | A large, oval, thin shell, olive-green to yellow-brown | An elongated, oval to oblong shell, yellowish-green to brown, with a pale, pearly lining |
| Larvae | Attach to the gills and fins of fish for a few weeks, then drop off to settle | Attach to the gills and fins of fish for a few weeks, then drop off to settle |
| Habitat | Lakes, ponds, canals, and slow rivers, partly buried in mud and sand | Rivers, canals, and lakes, half buried in sand, gravel, and mud with clean to moderately clean water |
| Name and use | Named for its large, graceful shape, and a host for the European bitterling's eggs | Named because artists once used its shells as small dishes to hold and mix pigments |
| Conservation status | Least Concern, though local populations have declined where water has been polluted or dredged | Least Concern, though local populations have declined where water has been polluted or dredged |
Swan Mussel vs Painter's Mussel: common questions
Which one is bigger?
The swan mussel, which can reach up to about 20 cm long, while the painter's mussel is usually 6 to 10 cm.
Why is it called the painter's mussel?
Its shells were once used by artists as small dishes to hold and mix their pigments.
Which one hosts bitterling eggs?
The swan mussel is one of the mussels in whose gills the European bitterling lays its eggs.