From The Guardian:

Thanks to photographer David Liittschwager, we now have a visual inkling of what exactly lives high in the cloud forest canopy, below our feet in the parks, in the sediments of rivers and on coral reefs. Liittschwager, primarily a portrait photographer, had the idea of taking a one-cubic-foot metal frame and recording what moved through this habitat over the course of a day and night. He then made portraits of the life that could be seen with the naked eye.