a fast painting of the sandworms, you know from Frank Herberts dune novels. I saw a documentation about sea fishes and one had some skin lappets between its jawbones to impress his enemies. Why not transfer this to the imposing worms?
Bless the Maker and His water... bless His comings and goings... may His passage cleanse the world, may He hold the world for his people!!! Ha ha, nice work, the idea of the worms having skin lappets is funny... but they were already pretty intimidating to begin with. Not sure if there is anything they really need to scare, everybody except the Fremen already are.