I am pretty sure this is coral of some sort but not certain. Almost looks like the tentacles of an anenome but I am sure anenome is too soft for preservation. Found in the Pennsylvanian oolitic Winterset limestone. I will post a few pictures and will certainly take more if needed for an ID! pic1 and pic4 were brushed with a bit of water to enhance the contrast a bit. Thanks for taking a look!
pic1 pic2
pic3 pic4