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Ribbed Mussels

Geukensia demissa

Max Size: 9cm (4 inches)
Habitat:  Rocks, piles, other shell-building organisms
Diet: Plankton
Fun Facts:


  • Mussels are semi-sessile organisms, meaning they can detach and reattach to surfaces such as rocks and pilings to better position themselves during changes in tides; they do this with hair-like, adhesive strands called byssal threads
  • Ribbed mussels can be distinguished from blue mussels by the texture of their shell. The shell is characterized by a series of ridges, or ribs, which is where this species gets its name
  • Male and female ribbed mussels can be distinguished by the color of their mantle, males tend to be yellowish while females are brown
  • The ribs on a ribbed mussel can be used to determine the age of the individual


Claws up for Crab Week

Crab Week is a weeklong crustacean celebration from July 14-20.

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