Pictures would really help.
Bloods, usually always should have the spine pronounced, not insanely but you definitely notice it. Its their... Look. So to speak.
Sitting Flat, Waiting for Food.
His First mouse with me ever, Constricting. You see the spine quite clearly here. Hes young still, and will grow larger and fatter.
Check out this page, and you will see more.
http://www.intriguingreptiles.com/Bl...odPythons.html
These are just sumatrans that im linking to. But, i think youll get the idea.