Looks like someone found something similar while browsing google images
Possible Crucifix Fish Skull or Sea Bird
It actually was for sell on Etsy..go figure.
Edit to add - now that I googled what a Crucifix fish skull it does look similar but it is missing the obvious "crucifix" like image in the bone
ridges...unless it's on the other side.
Yours looks a lot more like the unknown one I posted to though.
Someone on a thread that I am reading also said remnants of a dolphin skull? or a hard head cat fish....also look like this..I don't know.
Here's one of the crucifix ones that it is actually visible on.
edit on 1-6-2011 by pop_science because: (no reason given)