Looks like a concretion vaguely in the shape of a fish, with some shell fragments in it. Concretions can take many shapes, and sometimes resemble fossil life forms.

Good eye, wailele, that is a strange looking rock!
I agree with Victor, but still, I see the "sections" in what I think you are calling the tail and it does make you wonder.
But like Victor said, pieces and parts in a concretion can look like a lot of things.
Looks like the concretion must have dried out and formed cracks that were filled with the quartz or chalcedony or....
The " bands" in the white material in pic 2 and elsewhere on your piece are interesting. Almost look like agate "fortifications".

Glad to see you getting out in the field! Thanks for the pics!

Neat finds! Thanks for sharing.
Where did you find them?

The first pics are shell coquina and it looks like so coral as well.   the jasper looks like stone creek Jasper.   Where did you find it?

In regards to the earlier posts showing the fine examples of coquina, I believe these are weathered out cobbles naturally rounded by erosion, as opposed to concretions, formed in a different way.  It is easy to see many rounded rocks as being concretions, but many times they are just rounded rocks. I could be wrong, often am. Great stuff!