油黑壳菜蛤（学名：Mytilus trossulus），是贻贝目壳菜蛤科壳菜蛤属的一种。主要分布于**，常栖息在浅海珊瑚礁、岩石底。

Mytilus trossulus, the bay mussel or foolish mussel, is a medium-sized edible marine bivalve mollusc in the family Mytilidae.

Mytilus trossulus is one of the three principal, closely related taxa in the Mytilus e****s complex of blue mussels, which collectively are widely distributed on the temperate to subarctic coasts the Northern Hemisphere, and often are dominant inhabitants on hard substrates of the intertidal and nearshore habitats.