This one half of a bivalve shell was seen washed up into the intertidal zone of a mostly sandy strand.
Seen at the upper intertidal zone on a sandy strand somewhat north of the village of Cromarty. The subject of this observation is the bivalve not the seaweed.
Seen in the intertidal zone at near low tide.
Bivalvia is a class of marine and freshwater molluscs with laterally compressed bodies enclosed by a shell in two hinged parts. Bivalves include clams, oysters, mussels, scallops, and numerous other families of shells. The majority are filter feeders and have no head or radula. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment on the seabed, where they are safe from predation. Others lie on the sea...