Idotea wosnesenskii

Idotea wonsnesenskii, known as Wosnesensky's isopod or the rockweed isopod, is a marine isopod which lives on seaweed on rocky shores along the British Columbia and Washington coastlines. It can be as large as 3.5 cm long, is usually green, but its colour is adaptable to its environment. It can often be found hiding under rockweed (Fucus gardnerii) in the intertidal zone. It is sometimes known as a "picklebug" owing to its resemblance to a dill pickle.