mediterranean mussel (mytilus galloprovincialis), the mollusk secretes pseudofeces

pseudofeces ribbon black sea animal aquaculture barnacles benthal benthos bentos bivalve bivalves bivalvia bottom clam coast colony conch edible environment galloprovincialis group invertebrate invertebrates life marine mediterranean mussel mollusc mollusk mussels mytilidae mytilus nature seafood seashells sessile organisms shell shellfish waters wild blue mollusca undersea wildlife