So I found this interesting fossil in the Tamiami Formation, in Southwest Florida outside of Sunniland.
First I found the strange striations on the surface, and used our Geo Dept rock saw to get a better idea of what is is.
My thoughts are that it might be a bryozoan colony or a sponge fossil of some sort. Let me know if this looks like either. Some say it’s a coral (e.g., @vperez), some say definitely not a coral(e.g., @bostickkw).
@bostickkw, @rleder, @egardner It looks much like some of the primitive sponges we have in our Ordovician rocks. I don’t know about modern bryozoans but the Paleozoic ones have very small zoecia. This seems to have very large openings relatively speaking. You might research sclerosongia and see what you can discover.