Idotea wosnesenskii (Brandt, 1851) Pentidotea wosnesenskii is a marine isopod which lives on seaweed on rocky shores along the British Columbia and Washington coastlines, as far south as San Francisco.

[2] It can often be found hiding under rockweed (Fucus distichus) in the intertidal zone, and can be found at depths up to 919 metres (3,015 ft).

[3] It was described as Idotea wosnesenskii in 1851, by Johann Friedrich von Brandt, and is named after the Russian biologist Ilya G.

[2][4] The isopod grows up to 4 centimetres (1.6 in) in length and is usually green in colour.

[5] It is preyed upon by the surf scoter.