Tuesday: Nature's designs...is it a fractal?

I see fractals in nature so frequently and am facinated especially  by skeletons, be they leafless trees, the human body or as in the photos salmon skeleton.  The fish skeleton's repeat...would it be termed a fractal?  Walking along the frozen shore of the Fraser River we found several skeletons.  I could hardly stop taking photos.  There were many... skeletons and photos. The mouth in this state is rather scary.  all the endo of the salmon's like cycle.