various clams and shells on a beach in normandy, france

arcuatus beach bivalve clams coast coastal coastline collecting contamination cooking delicacy edible ensis europe exoskeleton feeders filter fish france green habitat harvesting marine mollusc molluscs mollusks mussels normandy northern ocean oysters palatable pharidae razor saltwater sand sandy scallops sea seafood shell shellfish shells summer summertime sustainable various winkles