Photomicrographer James E. Hayden, RBP has been a consistent winner of the Small World competition for many years. Featured below is a photomicrograph of a zebrafish specimen taken with darkfield illumination.

Danio rerio (Zebrafish) Gill Branches Original Magnification: 62.5x Specimen: Hematoxylin and Eosin Section Technique: Darkfield Illumination

In yet another section of the zebrafish seen in previous images at yet a higher magnification, the gill branches now remind the viewer of tree branches. The function of the structures becomes even more apparent by seeing the red and green blood as it goes in and out of the fish's breathing apparatus.