Mercenaria is a genus of bivalve molluscs in the family Veneridae. It includes the quahogs, Mercenaria mercenaria, the northern quahog or hard clam and M. campechiensis, the southern quahog, which commonly hybridise where their ranges overlap. Other species include the venus clam M. stimpsoni found in north Pacific waters, All these species were formerly placed in the related genus Venus. Several other species are known only from fossils. countries

Mercenaria