Barcode of Life Data Systems (BOLD) Stats Specimen Records:5282 Specimens with Sequences:4882 Specimens with Barcodes:4201 Species:296 Species With Barcodes:267 Public Records:4044 Public Species:248 Public BINs:202
Species in the family Mytilidae are found world-wide, but they are more abundant in colder seas, where they often form uninterrupted beds on rocky shores in the intertidal zone and the shallow subtidal. The subfamily Bathymodiolinae is found in deep-sea habitats.
Mytilids include the well-known edible sea mussels.
A common feature of the shells of mussels is an asymmetrical shell which has a thick, adherent periostracum. The animals attached themselves to a solid substrate using a byssus.