Active zoospores of Algae (Chlorophyta?).
Looks like tiny Euglena (with flagellum and red eyespot)
moving zoospores video:
http://www.youtube.com/watch?v=D2-Gh-ltQiM&feature
Zoosporangia:
(Nikon Planapo 100x / BF, DIC / Panasonic DMC-FX60)
Active zoospores of Algae
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