Good Lord. The more I learn about Vincent Ward's Alien 3 the more I think it would have ended up like some sort of Mad Magazine parody.
Re: Carlos Huante gorilla alien. I like it but as an Alien xeno it's lost the exoskeleton, it's lost the tail, it's lost the back pipes, it's lost the biomechanoid plating in favour of fleshy muscles. In fact, if you remove the elongated head and the epaulettes you haven't got a xeno at all. He should file it away for the next job in which he's asked to come up with an alien-as-bully-boy-thug design.
As for the mer-alien, you could lose the boobs and it would still retain the feminine look.