Geukensia demissa is a species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of bivalve mussel

Mussel

The common name mussel is used for members of several families of clams or bivalvia mollusca, from saltwater and freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which are often more or less rounded or oval.The...

 that is found on the Atlantic coast of North America. Its common names include Ribbed Mussel, and Atlantic Ribbed Mussel.

Distribution

Ribbed Mussels are found in coastal waters from the Gulf of St. Lawrence in northeastern Canada south along the western atlantic coast to Florida. It has been introduced to Texas, Mexico, California, and Venezuela

Habitat

Ribbed Mussels live in the intertidal zone attached to hard surfaces or embedded in sediment with the help of their byssal threads. They are often found in saltwater and estuarine marshes.