So lets say I came across a 5 gal bucket of what was labeled as fish tank rocks. But recognized as being something different. I believe this is a part of a skull plate Not in the greatest of shape. Definitely not taken care of. I found some that were broken and was able to mate them up. A lot of them look like rib bones from the curves. Anyone have any idea what I am looking at as far as species/age/etc? Lets just say that I paid what you should pay for a dirty bucket of fish tank rocks....and I honestly think they were actually in a fish tank at some point.