They are certainly better suited for hostile fauna on alien worlds. You can almost hear the Crocodile Hunter having fun with it. " Is that a face hugger? Crikey, those little monstrosities have acid for blood and really want to latch onto your face. If they do that this little bloke will lay an egg in your throat. None too pleasant mates. Then in few hours it pops off dead and the host wakes up. Poor bastard has a less than thirty minutes before this horrible parasite rip open their chest. Not a good way to go. Now let's go grab it by its tail. Right follow me camera man." God bless him.