Hello
Opistomum is a Turbellaria (flatworms)
You can reach a size of up to 4mm
To go from having no eyes, Epistomum avoids the light, to the point mate only at night
In the video we can see the uterus with eggs
http://www.youtube.com/watch?v=Gbe54OZCkx8
Francisco
Opistomum
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