Похоже, это обычное явление, см. wiki "Sea surface microlayer"
http://en.wikipedia.org/wiki/Sea_surface_microlayer.
Цитата оттуда: "The sea surface microlayer (SML) is the top 1000 micrometers (or 1 millimeter) of the ocean surface. It is the boundary layer where all exchange occurs between the atmosphere and the ocean.[1] The chemical, physical, and biological properties of the SML differ greatly from the sub-surface water just a few centimeters beneath.
...
Organic compounds such as amino acids, carbohydrates, fatty acids, and phenols are highly enriched in the SML interface.
...
Most of these come from biota in the sub-surface waters, which decay and become transported to the surface,[3][4] though other sources exist also such as atmospheric deposition, coastal runoff, and anthropogenic nutrification.[1] The relative concentration of these compounds is dependent on the nutrient sources as well as climate conditions such as wind speed and precipitation.[4] These organic compounds on the surface create a "film," referred to as a "slick" when visible,[2] which affects the physical and
optical properties of the interface. ".
Поскольку в нескольких сантиметрах (точнее, даже в миллиметрах) от поверхности находится обычная морская вода, то ветер (и др. факторы) может легко смещать верхний слой. Это и может проявиться как блестящие и матовые области, например.
