Alien: Covenant
Xenomorph Inner Mouth

Xenomorph Inner Mouth

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XenomorphMember1261 XPFeb-16-2017 1:33 AM

Have you ever wondered what/how/why the Inner mouth of the Xeno came to be.?  I was always curious about how they came up with the concept so I did some research.  The inner mouth of the Xeno is actually real.  It's crazy that something in our world has a similar mechanism.  It is called a Pharyngeal Jaw.  This is common to the Moray Eel.  The Moray Eel has a Pharyngeal Jaw.  It's nothing like the Xeno's and has a lot more in common with the Deacon then the actual Xeno, but still cool none the less.  I have included a diagram showing how the Pharyngeal Jaw functions.

Pretty awesome huh.  

23 Responses to Xenomorph Inner Mouth


OvomorphMember86 XPFeb-16-2017 1:42 AM

Hmm interesting, I wonder what the mouths of the next aliens will be like . Good find about the eels.


XenomorphMember1261 XPFeb-16-2017 1:51 AM

Yeah Its pretty cool.  I think the Moray Eel Inner Mouth is more like the deacon mouth Deacons only juts out a little bit.  The Moray Eels doesn't extend past its outer mouth.  It kind of reminds me of a snake mouth.  See below


PraetorianMember3073 XPFeb-16-2017 1:52 AMI always liked to think it was parasitic.I know it's not but it's a cool thought.Thanks for posting this one Rick,i had a similar idea thread in mind,but i think this will take care of it.

Nothing the God of biomechanics wouldn't let you in heaven for 


PraetorianMember3073 XPFeb-16-2017 1:54 AMThe deacons mouth was inspired by the goblin shark.Apparently it does something similar.

Nothing the God of biomechanics wouldn't let you in heaven for 


XenomorphMember1261 XPFeb-16-2017 3:45 AM

Image of Goble Goble I mean Goblin Shark.


PraetorianMember3073 XPFeb-16-2017 4:01 AMThanks for the pic Rick.God that thing is ugly lol.

Nothing the God of biomechanics wouldn't let you in heaven for 


OvomorphMember30 XPFeb-16-2017 7:05 AM

The inner mouth is meant to be phallic. Killing its prey by penetrating force. The xeno from Alien was intended to be a genderless, eyeless creature that rapes its victim at every life stage and truly ravaging the human body. 


DeaconMember10358 XPFeb-16-2017 3:55 PM

Indeed its surprising how many things in our Oceans connect to what we see in the Xenomorph and related Organisms Biology.

I know for sure they borrowed the Goblin Shark for the Deacon but as far as the Xeno i am not sure they referenced the Eel, i think it was just coincidence.

The original idea was a bit different and like below.

But he took this concept off from some of his other work, with similar like extended barbs if you would.  I am trying to think which few works he shown similar.




R.I.P Sox  01/01/2006 - 11/10/2017


PraetorianMember3378 XPFeb-16-2017 5:44 PM

BigDave, that will be your favourite one:

Gulper Eel

'An eel with a mouth like a pelican. Little is known about this deep-sea monster, which lives around 3,000 metres below the surface and grows up to six feet long.

Why they are terrifying: Their weirdly enlarged jaws and super stretchy stomachs allow them to swallow prey as large as they are.'


PraetorianMember3378 XPFeb-16-2017 7:05 PM

Goblin shark

'Goblin sharks live up to 1,300 metres below sea level and grow to around 3.5 metres long. They scan the seabed with super-long snouts, detecting the tiny electrical currents given off by all living things.

Why they are terrifying: Because they seem to detach their whole mouth from their body to grab their prey.'


PraetorianMember3378 XPFeb-16-2017 7:08 PM

Megamouth shark

'The megamouth shark grows to up to 5.5 metres long, yet wasn’t discovered until 1976. It has a massive mouth with a glowing light inside to attract its tiny plankton prey.

Why they are terrifying: Because only 55 specimens have ever been seen. If something so big can hide from is for so long, what else might be down there?'


PraetorianMember3378 XPFeb-16-2017 7:12 PM

What else?

Vampire squid (alias Facehugger squid)(...kiddin'):


PraetorianMember3378 XPFeb-16-2017 7:14 PM

Fangtooth (alias Biomecha Xeno fish)(...kiddin' again):



PraetorianMember3378 XPFeb-16-2017 7:16 PM

Anglerfish, Blackswallower, Barreleye, Blobfish:

Dr. Curt Connors

ChestbursterMember661 XPFeb-16-2017 7:18 PM

@Ati   I'm gonna have nightmares tonight, haha


PraetorianMember3378 XPFeb-16-2017 7:22 PM

That Blobfish is something... one can't find the words. And it exists.

Dr. Curt Connors

ChestbursterMember661 XPFeb-16-2017 7:24 PM

That thing is so creepy


PraetorianMember3073 XPFeb-17-2017 2:50 AMMagnificent finds Ati.There are some amazing things in the sea

Nothing the God of biomechanics wouldn't let you in heaven for 


XenomorphMember1261 XPFeb-17-2017 3:27 AM


I like this find better

Blob Fish for Dinner any body?


PraetorianMember3073 XPFeb-17-2017 4:51 AMMen In Black 3.When i first saw that movie,i thought it was just an alien,but then i found out it was real

Nothing the God of biomechanics wouldn't let you in heaven for 


FacehuggerMember355 XPFeb-17-2017 5:38 AM


Interesting comments posted about already, but I would like to take the vantage point of "Why this specialized skill was bred, spliced, or lucked onto by it's creators (Whether Engineer, David, or otherwise).

It's functions as a nice "concealed weapon" that works great in up close fighting.

That being said, I cannot honestly contrive a reason for it to exist other as a weapon.  It does not serve as purpose for eating, as the creature is equipped with a well-able  outer mouth with adequate choppers. It also does not have a function in mating, nurturing young, or socializing.

It also does not/should not serve as as a viable defense mechanism because the inner mouth relies on close proximity. Additionally, as we all know, the Xeno is equipped with a host of other skillsets and features that make it one tough hombre to attack (Quickness and agility, tough outer skin, acid for blood, nasty claws, etc.). That rules out natural selection.

This leads me to one conclusion. This feature was bred as part of an offensive arsenal for the Xeno. BLUF: I believe this creature was created as a weapon and all these features like the deadly inner mouth were contrived to make it as deadly as possible.

Let me know what you think. 

Dr. Curt Connors

ChestbursterMember661 XPFeb-17-2017 6:44 AM

@suwhited    I agree, I don't really see it as anything other than a weapon either.


TrilobiteMember8212 XPFeb-18-2017 2:56 PM


To add to your goblin shark post- about 15 seconds in:

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