SEM images of organisms on microplastic particle surfaces. SEM images of organisms on microplastic particle surfaces. A scale bar is located at the bottom right of each image with the value designating the length of the entire scale bar. (A) A bryozoan colony on the surface of a plastic particle. (B) An individual bryozoan zooid with diatom-shaped organisms attached to its operculum. (C) Region of a bryzoan zooid frontal membrane densely covered with cells of various phenotypes. (D to G) Cells on the surfaces of plastic particles. Jessica A. Bryant et al. mSystems 2016; doi:10.1128/mSystems.00024-16