Pond life. Composite image of a darkfield light micrograph of pond life behind an image of a light microscope. From top to bottom the image shows a larval stage copepod (Cyclops sp.), a Philodina sp. rotifer, a water flea (Daphnia sp.), a gastrotrich (left), a Paramecium caudatum ciliate (right) and part of a colony of Volvox sp. algae. Strands of filamentous algae cross the image. Components are not shown to scale.