<i><a href="//commons.wikimedia.org/wiki/Chaetodon_austriacus" title="Chaetodon austriacus">Chaetodon austriacus</a></i>; Original description: <b>Ocean bacteria with the light-sensitive proteorhodopsin enzyme live several meters above this coral reef.</b>
Boaz Harel
CC BY 2.5
<i>Light-Sensing Protein Illuminates Sun-Loving Ocean Bacteria.</i> PLoS Biology Vol. 3/8/2005, e287, <a href="//doi.org/10.1371/journal.pbio.0030287" class="extiw" title="doi:10.1371/journal.pbio.0030287">doi:10.1371/journal.pbio.0030287</a>.