Ayvah, please pay attention. We were talking about appearance. Must I quote my original argument again?
The lizards have sharp claws, and a large mouth filled with carnivorous teeth. This is indisputably violent, therefore savage.
"violent: using force to hurt or attack; used to describe a situation or event in which people are hurt or killed; sudden and powerful" [Cambridge Dictionary]
If we accept the Cambridge Dictionary as a credible source, it becomes obvious that the mere existence of claws or teeth on someone is independent of the quality of being violent. Please use a dictionary if you are uncertain of the meaning of some words.
