Image imported from derpibooru 
Original Description:
 
Y’know, getting your back/tail area mistaken for a butt can really be annoying at some point, and for our siren gal it has hit that point. All those times she spent sitting around the bottom of the ocean relaxing on the smooth, round, and curvy stones/rocks shaped certainly have an effect on her. Suffice to say that now the fusion mare can not go about nearly a nautical mile without having some fish or other creature giving the gal a questionable stare, no less at her developed and shaped rear….Sometimes you just gotta deal with it, and siren butt now has to deal with this rear heavy anatomy of hers.
 
Done by derpx-1
 
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