Spinycheek crayfish (Orconectes limosus). Coloured scanning electron micrograph (SEM) of a newborn spinycheek crayfish, showing one of its claws (bottom centre). This freshwater crustacean is native to the east coast of North America but has been introduced to Europe where it is become invasive species. This specimen measure 1 cm long.
Model release not required. Property release not required.