The blue mussels introduced in Dagupan rivers a few years ago are now considered a bane to local fish farmers raising signanid (malaga) and grouper (lapulapu). This was bared by Marvin Asis of the City Agriculture Office (CAO) during a committee hearing conducted on Tuesday by the City Council on the proposed Dagupan Comprehensive Development Plan for 2018 to 2022. De Asis said the blue-lipped mussels, which multiply rapidly, stick to the nets of fish cages and hinder the flow of water to the pens.

Blue mussels a 'bane' to Dagupan fish farmers. (2017, August 31). Manila Bulletin, p. B-9.