Jan Hamrsky / Solid orb mussel (Sphaerium solidum), Europe, July. Controlled conditions.

Jan Hamrsky / Solid orb mussel (Sphaerium solidum) burrowing into the sand, Europe, July. Controlled conditions.

Jan Hamrsky / Solid orb mussel (Sphaerium solidum) burrowing into the sand, Europe, July. Controlled conditions.

Nature Production / Pea crab {Pinnotheres sinensis} parasite of Clam {Ruditapes philippinarum} Japan

Willem Kolvoort / Underwater view of Greater european pea clam(Pisidium amnicum) in garden pond, Holland

Willem Kolvoort / Greater european pea clams / Pea mussels (Pisidium amnicum) filter feeding in garden pond, Holland

Willem Kolvoort / Greater european pea clams / Pea mussels (Pisidium amnicum) filter feeding in garden pond, Holland

Will Watson / River mussels / Nut orb mussels (Sphaerium rivicola) on riverbed, River Frome, Bromyard, Herefordshire, England, UK. November. Controlled conditions using microscopy.

Will Watson / River mussels / Nut orb mussels (Sphaerium rivicola) on riverbed, River Frome, Bromyard, Herefordshire, England, UK. November. Controlled conditions using microscopy.

Will Watson / Phoresis of Pea mussel (Pisidium sp.) and Diving beetle (Haliplus ruficollis agg.) portrait, Herefordshire, England, UK. September. Controlled conditons using microscopy. Focus stacked.