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

British Columbia

British Columbia is the westernmost of Canada's provinces and is known for its natural beauty, as reflected in its Latin motto, Splendor sine occasu . Its name was chosen by Queen Victoria in 1858...

 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

Intertidal zone

The intertidal zone is the area that is above water at low tide and under water at high tide . This area can include many different types of habitats, with many types of animals like starfish, sea urchins, and some species of coral...

. It is sometimes known as a "picklebug" owing to its resemblance to a dill pickle.