The common prawn is a small, almost transparent crustacean with red, blue and yellow markings. They often live in groups in rock crevices along the South Coast of Ireland. They move fairly quickly, using their legs to walk along the seafloor and tail fan to swim. The small front claws are used to pick up food.
While diving in Ireland you will find the common prawn on rocky seabeds where they live on carrion, detritus and plankton. They are quite small, only reaching a maximum 10cm long