Gammarus (amphipods)

Gammarus setosus is a small invertebrate, approximately 1 cm in length. Its green-grey body is segmented with several jointed appendages and two larger antennae near the head. As with all members of the Malacostraca, Gammarus setosus has mouthparts located at the head segments, with their legs branching from each thoracic section, and most of their abdominal sections. Typically, Gammarus setosus is found in the benthic sub-tidal or low inter-tidal regions. They can be found in the waters off the coast of British Columbia, but have been observed in nearly all of the world’s oceans.