When the sun is shining and the sea is calm I find currently many Laboea strobila ciliates on the watersurface (in the so called Neuston). In Internet I learnt that this ciliat is also photosynthesizing (mixotrophy) because it is retaining cloroplasts. These chloroplasts are called "kleptoplasts". With other words this ciliat is "stealing" (see the article in Wikipedia: http://en.wikipedia.org/wiki/Kleptoplas ... rnal_links ).
Obj. 40x, DIC.
The protozoon was 120 µm long
Images made through a microscope. All subject types.