This is the patch of the NASA/ESA/JAXA SEATEST II mission.<br>The artwork of the SEATEST II patch is derived from the <a href="https://en.wikipedia.org/wiki/Sea_Hunt" class="extiw" title="w:Sea Hunt">Sea Hunt</a> American adventure television series that aired from 1958 to 1961. The right section of the patch shows a red sting ray shape, turning into a star, and a galaxy-looking starfish. This evokes a strong analogy between the underwater and space environment.
NASA
<a rel="nofollow" class="external free" href="http://www.esa.int/spaceinimages/Images/2013/09/Seatest_logo">http://www.esa.int/spaceinimages/Images/2013/09/Seatest_logo</a>