exoskeleton

Edible crab Cancer pagurus pen and ink illustration with rich watercolour top wash, cut to white, stippled, view from above

Fresh water shrimp Gammarus pulex on a sandy background showing its laterally compressed sides

Horseshoe crab Limulus polyphemus wayercolour showing dorsal view of top of shell, cut to white

Woodlouse Porcellio scaber illustration showing the rough crey surface and segmented body. Cut to whtie