Osteichthyes or BONY fish appear from fossil evidence as far back as 420 million years ago when they appear to have differentiated from cartilaginous fishy things. Fossil records are sketchy but shapes and morphologies are visible in traces in very ancient rocks.

This odd origami attempts to hint at the faint fossil traces left in a rock of a conventional bony fish and it does a pretty good job for such a simple fold.

Designed by D M Nguyen, it uses a dragon scale at each rib-backbone intersection to give enough paper to raise from the surface along with some simple but effective pleating for head and tail. the frame is added to straighten up the outside edges and voila, a fish fossil.

There are many models I will try from VOG2, might also give the TRex skeleton a bash, but it is from a crease pattern so is much more challenging.