Black current (Kuroshio) carries marine debris originated in the east coast of Asian countries to the coasts of the Pacific Northwest.
Aerial photo image of Colombia River estuary region.

Partition line of each compartments are protective outer covering of Polyzoa. Median size of each compartment is 0.3mm x 0.8mm.
Photo taken with a polarization filter set to deliver clear image.

Bushy colony of Hydrozoa growing on the surface of plastic marine debris.

34 Goose Barnacles, Lepas anatifera found in a PET bottle cap at the beach of Ocean shores on Feb. 18, 2016.