Mussels are very easy to identify. They are a bi-valve shellfish that measures from two to three inches in length. The shell is primarily a blackish colour with bluish highlights and has an elongated triangular shape. Mussels are traditionally marketed fresh in the shell. The shells are usually closed tightly but they may open slightly when left undisturbed. When purchasing mussels check any open shells by tapping them. If the shells do not close when tapped, they should be discarded. It is relatively easy to distinguish between wild and cultured mussels. Wild mussels, which are a dull bluish colour with white erosion marks, usually have seaweeds or barnacles attached. In contrast, cultured mussels have shiny bluish-black shells, free of barnacles and seaweeds.














