California Blue Mussel

group of mussels attached to a rock with the ocean in the background
California Blue Mussels. NPS.

Quick Facts
Type: Mollusk

Diet: Omnivore: Phytoplankton, bits of ocean waste

Average lifespan: Up to 20 years

Average size: 3–5 in.

Average weight: Unknown

Did You Know?
Mussels eat by filtering water through their shells and straining out bits of food. They can filter two to three quarts of water in one hour!

Last updated: November 9, 2018