A very rare natural phenomenon coined Cappuccino coast (or Cappuccino sea). The thick foam is produced when salt water interacts with the breakdown products of underwater living creatures. This composition blend (turned bubbles) is tossed and churned up by powerful currents. 
Above: difference between light microscope (left) and electron microscope (right) observation.
Although renown for his orchestrated junk (above motorcycle, titled "Lunch With a Helmet On", was created entirely from forks, knives, and spoons) shadow sculptures, Shigeo Fukuda (1932-2009) was also widely acclaimed for his 3D, impossible objects, and anamorphic art design.
Speaking of illusions...