Monster Monday: Melusine, the Two-Tailed Shapeshifting Mermaid

Today's Monster Monday entry is the melusine, a fey creature with twin fish-tails and shimmering golden wings who takes the form of a beautiful woman in order to marry a mortal man and live the sweet life on his dime.

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(And before I start, yes I know I said I would try to update every Monday, and then failed to deliver the next Monday.  But hey, you got a Halloween update instead!)
The following text in gold is available as Open Game Content under the OGL. Open Game Content is (C)2013 Jonah Bomgaars.