Gaboon Viper skull: “The Gaboon viper is just weird. It looks dangerous even as a skull, with its great big fangs,” Winchester says. Note the jawbones, held loosely together so each side of the jaw can work independently.
This design belongs to my personal project I am working on, its a story about space marine fighting with alien creatures. I will post more in future. Its first time I used the real creature to develop my idea as inspiration.