For the Neomorph, we were using goblin shark reference from Ridley and a Carlos Huante design. The goblin shark has a jaw that sort of comes out and dislocates, and so we built an animatronic puppet close-up head which could do that. And it has this tiny little arsehole of a mouth, that was the reference. It was incredibly tight and pretty gross to look at. It could expand and dislocate to these snapping jaws. So a puppet head was built, and some beautifully translucent, full-scale heads were painted by Damian Martin and Julian Ledger.