Flatworm's Complex Reproductive System.

You wouldn't know it by looking at the photo, but this marine flatworm has got to have one of the most complex reproductive systems known to man:

Each worm has both male and female parts. This thumb-sized flatworm from Kaikoura has between 226 and 229 penises arranged in a band around its thin body, and a central vagina.

Link - via digg

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