summer beach. closeup view on big mussel with many small mussels on a sand and river with sunlight spots as background at sunset.

background beach beautiful bivalve bright calm close closeup coast coastal coastline color concept detail dof dreissena dune exotic greenshell holiday horizontal idyllic island leisure macro mollusk morning mussel natural nature nautilus nobody object outdoor outdoors outside pallas paradise pictorum polymorpha relax resort river sand sandy scenic sea seashore season shallow shell shore south spots summer sun sunlight sunny sunrise sunset sunshine tourism tourist travel tropical unio unionidae vacation water wildlife