綠藻
Green algae have been shown to play a significant role in ecosystems. A species of "Coccomyxa", "Coccomyxa parasitica", has been noted as parasitizing the wild mussels from the Vigo estuary in Galicia, Spain. The aggregations of the green algae occur in the mantle, gill filaments, adductor muscle, visceral mass, and haemolymph of the species "M. galloprovincialis". It also has a symbiotic relationship with fungi, specifically ascomycetes and basidiomycetes.