Dersas live in the rocks while young I believe so it would make sense that the grind there shell smooth in the rock work. Once living in the sand though they would have nothing to grind against. I could be completely off base on this though.<a href=showthread.php?s=&postid=15443170#post15443170 target=_blank>Originally posted</a> by DSR
Got home last night and checked out my derasa and no scutes at all, very smooth. But the folds go all the way down to the umbro. Had never noticed that before thanks for point that out.