Any of several marine bivalve mollusks, especially the edible members of the family Mytilidae and in particular Mytilus edulis, a blue-black species raised commercially in Europe. Mussels are often found attached to rocky surfaces or the sides of ships.

• 贻贝一种海产双壳软体动物，特别是贻贝科中可食的可食贻贝（一种在欧洲养殖的黑蓝色物种）。常会着在岸石表面或者船侧面