|Body of the beast.|
|Head or tail or something.|
I just received this email. I suggest going to this gentleman's site, which is full of wonderful photos, as well as contact info for diving services. The skate backbones had been washing up on the beach of late, so yes, this is very likely one of their egg cases, in a very degraded state.
Thanks for the comment on the site. It is a labor of love.
It is hard to tell from the pics, but if I had to guess I think what you found is an egg casing for a shark or skate. It looks fairly deteriorated as it has long ago hatched, but unhatched ones look like this:
Thanks for sharing!
Emerald Diving, LLC
Discover the beauty within Pacific Northwest waters