This image shows a group of elongated cells (hyphae) from the filamentous fungus Podospora anserina. They are labeled with a fluorescent stain, JC-1, that labels areas of high metabolic activity (orange-red staining).  It was taken by a high-resolution camera attached to a fluorescence microscope. The magnification is 630x.
<a href="//commons.wikimedia.org/w/index.php?title=User:Zodarion73&amp;action=edit&amp;redlink=1" class="new" title="User:Zodarion73 (page does not exist)">Christian Scheckhuber</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>