Way to go, Flisch, you delayed the update a month!
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Ok, enough of that.
Stats:
Speed: Medium
Habitat: Ocean (Sunlight Zone)
Diet: Other SCO's
Size: Microscopic
Sences: N/A
Eventually, some Plasti (I'm calling that as a placeholder, if you can think of something better, by all means, say it.) evolved a single Flagella as a form of locomotion. This allowed it to move actively and a higher chance to run into other single celled organisms. Thus, the population increased.

(I know, cheap picture. Bite me

)