http://en.wikipedia.org/wiki/Sonic_hedgehog
During my brief high school internship at NIH, I was discouraged against naming my programs 'creatively'.
p.s. In fish, there are two "extra" Hedgehog genes, echidna hedgehog and tiggywinkle hedgehog. Both of these genes are expressed along the midline of the fish embryo and may act with Sonic hedgehog in establishing the fates of the midline cells.
http://7e.devbio.com/article.php?ch=6&id=58
