Contribusion of the knowledge of the malacological of bivalves in the Moroccan Mediteranean coast

This research paper is a contribution to the knowledge of the bivalve fauna of the coastal zones in moroccan mediterranean sea. it presents the biological variety of the bivalve molluscs from the kiss river in saidia beach to sfiha beach in al hoceima city. the systematic determinations, allowed us to establish a first exhaustive inventory of the biodiversity of bivalves in these coastal housing environments and their specific wealth. different species belonging to 20 families were described and mapped in a catalogue. different habitats have been diagnosed as threats to malacological fauna besides the impact of craft fishing pressure on some bivalves of economic interest.