Shell and a mystery

[MineralsAndThings]

I know the first one is a shell and I found it in a soccer field and I think it's a fossil due to the way it looks but I could be wrong also. The one on the right however is a mystery. I know it was probably something that lived in the ocean because that is where I found it. The way it looks also makes me think that the creature lived in the water. I know one thing about it though and that's the fact of me being very happy to have found it.

What do you think though?

 

[mollyk927]

The one on the right looks like a sea robin skull plate (fossil): Searobin Skull Plates - Member Collections - The Fossil Forum

 

[MineralsAndThings]

The one on the right looks like a sea robin skull plate (fossil): Searobin Skull Plates - Member Collections - The Fossil Forum

I agree it does indeed look that way. It seems I also belong to that site that the link leads to but I forgot that I did. So two good things have happened from posting this thread!