Bioluminescent bacteria
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/84221353@N00">Rob Cruickshank</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/84221353@N00/26693958635/">Bioluminescent bacteria</a>