<a href="https://en.wikipedia.org/wiki/Aluminaut" class="extiw" title="en:Aluminaut">Aluminaut</a> underwater
NOAA Photo Library: OAR/National Undersea Research Program
<a rel="nofollow" class="external free" href="http://www.photolib.noaa.gov/700s/nur07556.jpg">http://www.photolib.noaa.gov/700s/nur07556.jpg</a>