Extremely Peculiar' Sea Animal Has Grow-Again Penis

http://www.businessinsider.com/extremely-peculiar-sea-animal-has-grow-again-penis-2013-2



Scientists reported Wednesday on the bizarre sex life of a sea slug that discards its penis after copulation. Then grows a new one.

"No other animal is known to repeatedly copulate using such 'disposable penes'," Japanese biologists wrote in the Royal Society journal Biology Letters, describing the behaviour as "extremely peculiar".

Dubbed Chromodoris reticulata in Latin, the red-and-white slug -- technically a shell-less mollusc -- inhabits warms waters in Southeast Asia.

The critter needs 24 hours between couplings to unroll an internally coiled and compressed juvenile penis to replace the used, external bit, the scientists found.


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