Latin: Mytilus edulis
Engelsk: Blue mussel
Fransk: Moule commune
Tysk: Miesmuschel, Pfahlmuschel
Blue mussels are found along the entire Norwegian coast at 0 to 10 meters depth, often as belts in the shorline tidal zone or futher inside the fjords. They feed on phytoplankton. Blue mussels spawn usually between April and June, when water temperatures are between eight and ten degrees. The fertilized eggs develop into larvae that swim freely in about a month until they are deposited on to surfaces of rocks, cliffs, boats and moorings. The blue mussels attach themselves to the substrate by means of so called byssust-treads secreted from the feet and can subsequently move by stretching new threads.
Up to 10-15 cm
20 years or more
Recreational harvesting is common, and some harvesting is done from a boat on the mussel banks. The season is all year round, but the best blue mussels harvested are in the fall and winter. Mussels are grown on to also flexural horizontal systems of ropes held up by buoys, and from these lines hanging ropes or straps where mussels can attach themselves.