Spotting

@TJginger
"No, sharks and all other fishes belonging to the class Chondrichthyes lack true bone, but rather have cartilaginous skeletons ... Due to cartilage being softer than bone, it is very rare to find complete fossil remains of sharks" http://www.flmnh.ufl.edu/fish/education/...

"No sharks do not have bones."
http://beachchairscientist.com/2009/01/0...

"...sharks possess skeletons made completely of cartilage"
http://www.ccmr.cornell.edu/education/as...

Just saw this! It is hard to get a sense of scale from the picture. Do you remember a size? Do you have any measurements?

Please consider adding this to the "Identifying Animals Through Osteology Mission: http://www.projectnoah.org/missions/8475...

Sharks dont have bones. Maybe it's a whale bone.