Originally formed in 1986 as OPMAR, it changed to OPMEGA in 1996.
Since its foundation, OPMEGA join all the producers of Galician estuaries, where the work, improvement and defense of their interests and their mussel are very important.
OPMEGA is the most representative organization of the Galician mussel sector; it is present in all areas, both local and national, where the interests are debated or eventually defended and where the interests of this sector are announced.
Currently it is integrated by 579 rafts and 355 members reunited in 11 delegations distributed in the estuaries of Muros and Noia, Arousa, Pontevedra, Vigo and Portugal.