Recurrent cruise to assess King scallop stocks in the bay of Seine. The objectives were to: 1) assess King scallop stocks in the bay of Seine in order to determine scientific bases to manage this fishery; 2) proceed with taking samples (King scallops, whelks, fish, crustaceans, water, plankton) for analyses in the context of various health monitoring schemes: looking for toxic phytoplankton (Dinophysis and Pseudonitzschia) in the Bay of Seine, following a sampling protocol set up in the ASP monitoring framework; 3) take samples of various species of benthic macrofauna in the framework of studies on food webs in the English Channel ecosystem.