After patient use with a pipette, I managed to capture and view this copepod. The two large clumps toward the posterior of the crustacean are egg sacks; so naturally, it’s presumed that this particular specimen is female.
Above: A stunning dark field photomicrograph.
Above: The ciliates Epistylis and Vorticella typically attach to copepods as epibionts. And epibiont is a form of symbiont, wherein the organism resides on the epidermis of its host. Of course, Sessilids such as Epistylus and Vorticella will naturally attach themselves to substrates of all sorts, including eachother.