Uh... just a thought on the 'ID' of the above-mentioned sea water oval-shaped animal,
From past comments and conjectures it runs in my mind, feeble as it is, that skins, fur, hides or pieces-parts are not legal to own or wear. Also, not sure about same in historical situations or historical displays but if I recall correctly I was told many years ago by an officer that monitored suchlike that it was not in anybodies best interest to have/own or wear, if you all get the drift of same.
Well, take it as you will, just a random thought on the propriety of same, mayhaps others in the legal vein such as our GAF friend from Canada, eh, have a more definitive idea or recent position on same.
Best regards and always hope for the best.
'Ol Gabe