Metro Last Light Shrimp Variance | Shrimp Males, Females and Bog Shrimp Boss Explained | Metro Lore
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- An interesting thing has happened to the Shrimp in the Metro series. They morphology is completely separate from one another for the most part. So are they related? Different species? Whats the deal? Lets dive in to the lore of the local fauna and learn about how radiation has induced some serious mutations in the populace!
Thanks for watching Roanoke Gaming and I hope you enjoy Metro Last Light Shrimp Variance and Relation | Shrimp Males, Females, and Bog Shrimp Explained
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hey ı was gonna ask can you these types of videos about zeds in killing floor 1 and 2?????
Roanoke Gaming lets hope no one thinks your saying woman are weaker
Are you going to make the metro food chain after you get all the animals in the game to give us a ideal of them.
Love you videos (^^) and do you have any ideals why there are no herbivores in metro?
Can you please do Mass effect and destiny
Omg thank you my dude, you have finally made the video. Thank so much even though I'm late to the video because school, then football practice, and marching band practice this is great to come home to. Have an awesome time and keep making vids.
Crab people. Crab people.
Taste like crab, talk like people
Nice
@@zoidberg6709 wabbabababababab
*BUM* BUM *BUM* BUM *BUM* BUM *BUM* BUM
Why is your profile image Foot Fetish "art"?
Just imagine an mantis shrimp mutated from all of that!
A Field Medics favorit type of being in the metro games
Why do the above ground ones slightly look like the queens from aliens
"shrimps" are leeches because you can see it's sucker and the bigger one with shield arms are catfish you can tell by the face
The question is are they stronger and better than the Librarians or weaker?
I watch these with my girlfriend and at 3:54 she gave me "the look"
Who doesn't love shrimp? You can fry it, broil it, boil it, shoot it. Hell it's okay if it's mutated, that adds flavor.
theres gumbo shrimp, fried shrimp, stewed shrimp, grilled shrimp....
(forest gump reference)
@@RoanokeGaming gamma rayed shrimp
Mutated crabs (mirelurks from fallout) would probably be tasty as well.
I would...
But i'm allergic :(
I mean some guy in the metro say shrimps go good with beer
Tbh I always secretly thought they were mutated dragonflies stuck in their larvae like state due to radiation and mutations. Idk it all pretty much stems from the females claw like appendage on the underside of her looking very similar to what a young dragonfly has and the number of limbs, but hey that’s just me lol
Also
Just curious, since this is a Metro video, are you still planning to do the winged nosalis or rhino nosalis episode?, just wondering
Holy shit this is a revelation
Thanks for posting that before me, I couldn’t describe it better. That pincer limp totally looks like dragonfly larvae.
I thought the same thing.
was looking at them today and had the same thought
Crawdad: Hey you GET OFF MY TERRITORY!!!
Humans: No u
Crawfather: nay thee
Crawdad ( ? Go home Human your drunk )
Drunk Human ( No U INTENSIFIES )
Lol.
No u
*swamp deathclaw* GET OUT OF MY SWAMP!!!
They do look like they might taste good.
Right? and there is legit like 200 pounds of meat, oh my god, so much food
Roanoke Gaming I’m starting to wonder what mutant creatures might overrun the American Continent. We’d probably have more dangers do to the different variety of ecosystems and environments.
Pretty sure I remember the fishermen mentioning that they taste terrible, but are filling.
@@RoanokeGaming yeah likes a a eating a deer but just shrimp that'd be great
J.A Vance “we call them Shrimps. Ugly as hell but they’re good eating especially with beer!”
Really? Nobody? Okay.
CD: *chokes Artyom*
A: Harder, Crawdaddy
CD: WHAT.
A: WHAT.
But just to continue with my additional text info dumps as usual, here is some more:
1) THEY GOT THE POW... I MEAN LUNGS. Seriously, crawdads are supposedly breathe trough gills, that kinda resemble feathers bent into a half circle. However, that does NOT allow them air breathing, meaning they either evolved lungs (which would be possible as convergent evolution). However, they seem to thrive on land far from water.
2) THEY GOT THE POWER! I mean, really, that chitinous plating is MASSIVE. And chitin is heavy. That means they have some serious muscle mass underneath that armour, and kinda raises the question, how the heck does it support that massive weight without crushing it's own lower body?
3) THEY GOT THE CHEATS! Invertebrate circulatory systems should simply fail at current oxygen levels on anything larger than a cat. How they keep their organs supplied with oxygen is simply beyond me. Perhaps the bombs somehow supercharged the air with oxygen, due to A) greatly reduced wildlife to consume it, B) the oceans are largely unaffected, and keep producing oxygen, perhaps even at a larger rate due to mutations [remember, no bombs at the ocean] C) fukking hakz.
Very informative and I too think its straight hax lol
I'm not all that familiar with Metro lore but surely oxygen levels would increase a few decades after nuclear war since they would be no man-made pollution. Taking a few billions cars off the road would knock the oxygen levels up a bit I'd think.
I think you're confusing 'inverterbrates' with arthropods that breathe through their skin, namely insects.
Giant insects cannot survive without high concentrations of oxygen because the pores of the skin that they breathe through are extremely inefficient at distributing oxygen throughout the body and compete for space with other parts of the creature's anatomy.
Invertebrates, on the other hand, can grow to massive size; the Giant Squid and Colossal Squid can reach sizes upwards of 50 feet. Further, it's an established fact that many invertebrates never stop growing throughout their lives and can live for extremely long periods of time, but often die prematurely due to predation, disease, starvation, or exhaustion.
@@Brutalyte616 invertebrates can grow to massive sizes as long as there is something that takes the chore of supporting their weight.
Giand squid lives underwater, and water supports their weight
@@5xg378 True, but even then they are outliers; most invertebrates don't exceed a few inches in length. And in the case of the giant arthropods of the Carboniferous period, who were also invertebrates, their limiting factor was the amount of available oxygen in the atmosphere, not the weight of their bodies.
Oh cool shrimp... WTF IS THAT DEMON SPAWN
a delicious demon spawn
Coconut hell spawn
Demon prawn
@@gavensedgwick6516 I'm glad someone said it...
I'm pretty sure the actual lore agrees with the sexual dimorphism as is presented here, but I can't help but see how backwards it is. Many crustaceans have opposite sexual dimorphism. Females are large and strong to carry vast numbers of eggs and survive longer to create more offspring, while males are smaller and generally only exist to provide sperm. Crustaceans are also not parental, and simply leave offspring where they lay them and move on, and at most protect the eggs until they hatch. So, it's entirely possible that the weak males live underground whole the strong females live on the surface and venture into the Metro to lay eggs that get externally fertilized by males, and then return to the surface.
That would support the bog shrimp being called mother shrimp
that's a good point! I base my assumption of the males on the surface vs the females underground on that the bog shrimp, while people seem to refer to it as the shrimp mother, the game files call it an alpha male, and because it doesn't look like the shrimp underground and looks like a larger shrimp above ground, I concluded they were male
Nope the males are bigger than females due to the radiation. Radiation can change any living thing. So the Radiation completely changed the crustaceans genes, behavior etc. Which I why they males are larger. In sum crustaceans species the males are larger or have larger claws than the females.bbut since we're talking about Crawfish, the males are larger
On the official Metro Exodus website they confirmed, that the armoured ones are male and the spitting ones are female.
@@RoanokeGaming As I said, the lore in-game and the files point towards your presentation, and it's the truth for this game's world, I just pointed out a minor discrepancy with our world I found interesting. Shrimps are still awesome and you made a great video as always
You should cover those spider/scorpion things next
I will be covering those later!
You mean "Your worst nightmare"?
I belive you were talking about the satan creatures that prevent me from looting where ever they exist?
I think that it is more likely that the 'shrimp' originated from either dragonfly or damselfly nymphs. That is because, as far as I know, dragonflies and damselflies are the only creatures who, in their nymph stage, have labium. Both types of 'shrimp' also have modified forms of labium. The presumed females`labium is very similar to what modern day dragonfly and damselfly nymphs` have and the presumed males seem to have adapted to use their`s for locomotion as well as defense and catching prey. Also, great video by the way! I love watching your videos about theorizing the biology of fiction creatures. Keep up the great work my man!
I think the shrimp in the metro are are the juveniles. I vaguely remember seeing something on the wiki where there are like 3 stages the small ones that you see on the ground, the medium ones in the metro, and the armored ones on the top with the huge one being the dominant ones.
I thought they were fresh water lobsters.
lobsters are big crayfish but there is a delicacy in Russia where they eat cray fish with beer and they make mention of it in the game
Hey Roanoke you should do some morphology of creatures in the fallout universe
I do have fallout planned for the future
Roanoke Gaming awesome I figured you did I just thought I’d put my suggestion, thanks for the reply too :)
Agree
Perhaps more sifi? All of the big star movies/shows?
Is it just me, or do a majority of creatures in this game have a preference to walk on their knuckles? What advantages does that have over walking on palms?
its almost like they become beastly versions of themselves, and My best guess is because the claws are so heavy, they now use them for locomotion as well so they don't have to just straight up carry them all the time
@@RoanokeGaming yeah, but the Mutant shrews and Librarians knuckle walk too. Any guesses on why?
Either cause of their apelike/other past, or just aesthetics.
@@praetorianrex5571 My guess is that it helps support the increased bulk of the creature and encourages the growth of strong wrists.
Nature must want to keep the pimp hand strong, even in the post-nuclear apocalypse...
@Baka Gajin Yet bears are so muscled they can use their claws, which are always out, to gut and maul you. At least I think that's what I heard...
I only have a theory and a question first the very small theory the circle shaped mouths are used for laying eggs. Now the question do the shrimp taste like shrimp and if so what's the most delicious creature in the metro. Actually that might be two questions.
laying eggs via mouth? that would suck lol and supposedly according to in game dialogue they are quite delicious! moreso with beer
Could be that there isn't enough food in the rivers for the large males, they seem to be more ravenous and the surface has much more prey.
that's also a possibility
Aww, love from Roanoke, I feel so special!
It's confirmed in exodus that the small shrimps are female and the large ones are male
I don't know why but these shrimp always looked so tasty. I mean they may not taste good but still
bruh they made me quite hungry tbh
If these shrimps taste anything like their pre-bomb cousins, I'd be willing to put up with radiation fallout to eat them everyday
@@thosebloodybadgers8499 you kill one, and you're good for like two weeks
Your profile picture matches your comment perfectly
Well the fisherman, whose name escapes me, mentions that they're "Good eating" so they're apparently quite tasty along with containing lots of meat, you can even find a woman butchering one on the pier at the start of Vencine when you first get off the boat
Well... You don't have to theorize on the sexual dimorphism, since it has been twice confirmed that the armoured ones (most of them at least) are males, and the spitting ones are females. First in the Last Light game files, which refers to the different variants as males and females in the file names, and second in the Metro Exodus website, which clarifies on the sexes of the two main variants. However, what is a bit confusing is the Bog Shrimp, which looks very much like the males, but is referred in game as a "Bog Mother". Of course, while it might seem that the Bog Shrimp being called a "Bog Mother" contradicts the sexual dimorphism this game establishes in relation to this species, it probably is not a mistake in the game. There are species where one sex can take on traits generally attributed to that of the opposite sex. Maybe the sexual dimorphism of the shrimp works similar to that of ants, where all the males (drones) generally have wings, and all the females (workers) are generally wingless, but there is a rare exception among females in which wings do develop, that is the queens. We also see this with cuttlefish, where some males under rare circumstances develop female physical traits to fool other males in an act of sexual mimicry. Sometimes these disguised males have sex with other males. Talk about a trap!
xxFalconArasxx with the cuddle fish it isn’t taking on traits it is mimicking the female so the weaker male can get a female first
They may be related to prawns. Prawns display physical attributes similar to the shrimp in the series the long arms in the front and long tail in the back(which the rest may deviate over an irradiated evolutionary time). They can also be easily farmed which may also explain large numbers of them.
Interesting! Something I hadn't considered, thank you for the input!
FOOKIN PRAWNS
Which animal will you analyze next of the metro series’s?!
I believe I will be looking at the Rhino!
the tunnel ones reminded me of lampreys that banged something with a shell
they are quite similar to that proposed idea haha
Idk i found the shed of a crawfish one time and i measured it to 1 foot 2 and a half inches and thats close enough for me to accept that nickname mountain lobster plus they are indefinite growers meaning they get bigger till something kills them like disease or predators btw the shrimp looks more like a mantis shrimp so please take this info in a future video
And yes it looked nothing like a lobster but was a scaled up version of the crawfish in the area so definitely a gigantic crawfish
good LORD that is a big craw dad, alright yah I can see that thing being a lobster lol
I found one one time in a creek of WV that's had to be at least 1 and half ft long. Was wading through the water and I thought I saw a fucking lobster. Had to of been 6 years ago.
Whatcha doin' in me swamp donkey?
getting shot multiple times haha
Now I'm going to buy a pound of Crawfish this Sunday.
They are delicious.
I am craving shrimp or craw fish now tbh
Plus a cold beer and you are good to go
Fun fact: crawfish often helps with the decomposition of human corpses by consuming the rotting soft tissues on the carcasses. A process which makes them even more juicy and tasty than usual.
I would personally recommend the hot peppery and spicy crawfish dishes seen in Chinese Sichuanese cuisine. The meat ain’t much per normal, but the stimulating taste is great for spice lovers. Rotten corpses aside.
Make sure to either
A: put them in water without food
B: disembowel them
@@felisasininus1784
2nd hand cannibalism
I love your videos!!!! Amazing lore, morphology, and very well written!! Keep it up!
thanks bro! I am happy to hear you enjoyed it! or are currently enjoying it lol
69k subs eh?
Anyone?
No?
Alright '-'
oh believe me, I have been cracking jokes left, right and center haha
Would you ever consider looking at some of the creatures from the fallout series?
I have! I will be covering fallout in the future!
Awesome
Besides being less threatening, the underground variation probably has less armor to have an easier time scurrying around the small tunnels. The wormlike mouth might be an adaptation to catch/feed off creatures and vegetation where the body will not fit.
For the males, besides the need for competition and self defense, it might be an ambush predator, they gonna need that protein and nutrient influx with low risk to grow that big and make that much armor
8:15 *Attack its weak point for massive damage.* *_*uhem*_*
Wow so much change for a small fry
you should do S.T.A.L.K.E.R after Metro
I have a computer for that! is it on Steam?
10:38 one of the coolest moments of the game.
Like a true russian haha
Actually, I don't think the males have a "crocodile mouth" simply because to me it looks like the armor on the top and bottom of the head is acting as a upper and lower jaw/row of teeth (kinda like a dunkleosteous)
I love these games and the only thing I love more then them, is knowing more about them
then you've come to the right place! haha
Russian lobsters on unicycles!
yay! more metro lore please!
absolutely!
And from your perspective as a biologist is the metro games a accurate thing that shows what high radiation levels would do to life
Doesnt high radiation just kill you? Things like fallout/metro would be impossible. But i dunno
high radiation does in fact cook and kill everything. if the levels were low enough perhaps some creatures could have survived to reproduce, but for the most part I would imagine the surface would be toast
Btw what kind of biologist and if what degree such as masters bachelors
Things like what you see in games like this are indeed not possible. Any mutations would be genetic degradation and not visible.
Most mutations would lead to the death of animals involved due to sterility or genetic destruction. You can use real-world Chernobyl as an excellent example.
The original Fallout games (1 & 2 specifically) actually explain the mutations being the result of mutated, airborne FEV that leaked from test sites and not radiation.
8:05 I'm very sure that weight of the armor is not directly responsible for durability. The more appropriate term I would say is that their armor has more tensile strength. It's like that between lead Vs steel.
in biological organisms, typically more weight = better armor. Depending on what the demands are this could be a whole host of materials, blubber for whales in frigid water, Hair protecting the bear from attacks by other bears and shielding them from the cold, in this case heavier exo skeleton protecting the shrimp
@@RoanokeGaming although, is their a variation of chitin that has more density or tensile strength than normal? Then again, is there a cost in bodily resources for such density or tensile strength?
Wander if he actually taste like shrimp
I am like 99% sure they are delicious
@@RoanokeGaming And radiated to all Hell!
Bet museum mode is sooooo helpful for Metro vids
hands down the most helpful tbh
I was watching your other morphology videos yesterday and was wondering where this video was nice timing.
excellent! usually I have terrible timing lol
well, now you have momentum. Keep up the good work I quite enjoy your videos.
Mad respect for how consistent you are with content and listening to fans keep up the good work
absolutely my dude! I enjoy the interaction!
I thought the Shrimps in the metro evolved from leeches , cuz their mouths look much diffrent from the surface shrimp .
I believe it is sexual dimorphism personally
well i don't realy know much about the Metro series , but good job on the video :)
To succ
Dunno if there is already a theory about underground shrimps, but as for me they look not like crawdads but more like a dragonfly nymph.
Ejecting lower jaw to catch and hold prey, aquatic habitat, etc.
I have one thing to say
The chasm, King kong 2010
that would be cool, may need to track down my old copy of king kong
Nnope nope nope nope, i still have nightmares from that worm scene
Metro Exodus confirmed that the ones with the armored front claws are the males, and the others are the females.
this is so sexist, feminine also have bigger armor than male if the want to
SCIENCE!
It actually makes sense, since the female has to be bigger to bear children and defend them
I don't think the shrimp are intelligent enough to "want" anything, much less comprehend the concept of sexism. But you don't seem to fully comprehend what that is either...
That One r/whoosh
You trollin'.
So freaking cool. I love knowing more about these monsters. It makes them feel more alive an like they really do exsit
glad you enjoy the videos bro!
Shrimps around the world: we eat them
Shrimps in russia:they eat us
Classic Soviet Russia!
@@RoanokeGaming Raise the vodka
Actually looks more like the supposed Jaws on the males might actually be modified exoskeletal plates.
.
Because if you look into their mouth it appears that they still have said warm like mouth but it simply sunk back into the head.
.
With the front job more than likely being used to crush it spray to make it easier for the smaller Jaws to prepared for consumption.
.
But who knows maybe they are actually separate species it's plausible but sexual dimorphism can be drastic in some cases.
interesting! I will have to look at it!
As Metro Creatures go, i think the Shrimp are very straight-forward in an Animal sense, what i mean is, they act like normal animals now, sure they became more intelligent than what they were, but they are not at the level of say, the watchmen or librarians, i like them a lot! Also they are good eating! mostly with Beer~
Are you going to do the other Nosalis? i always got the Theory that the Winged and Rhino Nosalis are just called that by us Humans, because each has a "nose trait", i doubt they all are of the Same species, even if the Rhino and Winged are considered "females" of the Nosalis species, i just think evolution made all of 'em work together somehow, maybe they are from the same Family, but not same Species~
I may have to disagree on the potential source of the shrimps in the metro. While I will not say that it is definitely not a crayfish or similar (pretty sure that crayfish in Russia are actually quite popular so its a valid contender) i always found moresimilarity to fairy or tadpole shrimp. Would have to play back through to reallyget that feel again for why i got that, but atthe very least their capacity to lay numerous eggs that can weather insane conditions and drought for many years is something to consider. I would have to look into this further and admit fully to my own bias as i am fascinated with these creatures, but putting it out there for your consideration.
Also, you might be surprised at just how many fresh water shrimps there actually are, as well assome that live part of their life in fresh and another lart in salt. Great video none the less. :)
I remember when I fought the Mother Shrimp. My gas mask no longer had any filters, so I kept dying over and over again from the air. And after the seventh restart, I had the miraculous idea of constantly taking the filter off and putting it back on. I'd wait until I was close to asphyxiation and then I'd put it back on. Over and over again. It gave me that extra minute to survive, and my teammates killed it.
I'll never forget that boss fight.
I'm surprised to find this comment because I had the same thing happen to me and when I recount it to other people they look at me like I'm crazy for being low at that point. The autosave really screwed me here because I went around collecting shit before powering the dingy that took you across which takes FOREVER, then I looked around the buildings on the other side for secrets. I knew I was running low on filters at that point but I figured I could just restart and run to each thing I had found, then I jump down with like 9 seconds to spare and a freaking boss fight ensues and quicksaves...thanks Metro! After getting stuck in an endless deathloop I wasn't as smart as you, I downloaded a cheat engine to just get me past that part because god knows I was not replaying that far into the game.
@@Goldenkitten1 hell yeah
Holy shit I just realized.... fuckinn mutant mosquitos they gonna be killers in the south
You think those are bad just imagine what the brown recluse spiders you guys have down south are going to be like.
@@wesrrowlands8309 yea but what I’m more scared about is the diamond backs and the alligators
I googled the crustaceans in russia. Was crab but i might have searched it wrong??
Crawfish? Those buggers are called Yabbies in Australia believe it or not
Crawdad you mean crustacean papa
its good that metro exodus confirmed that they are different genders not different evolutions
What's up Roanoke hey are you playing alien isolation live stream today
probably not today, got to get crackin on the next video!
Louisiana call em crawfish and Louisiana is pretty south I reckon
The fact you can eat them and not get rad poisoning is astounding to me...
3:51 Mf still had his cigarette in his mouth after nearly being killed
One survived a fight with the she-bear. That is terrifying.
This is my favorite video series on youtube
I am glad to hear that bro!
You deserve it man ! Your are the only youtuber i have seen that has a legitimate high level of education that incorporates it into his videos which is simply incredible
How does radiation cause Creatures to become larger and rapidly evolve is it actually even possible if a creature where exposed to such high concentrated amounts of radiation that they would evolve into something else?
Depends on if they survive the radiation and don't get cancer.
Him: “shrimp are only in the ocean”
Me: *looks over at my freshwater fish tank full of shrimp* “uh.....”
Freshwater shrimp are called crawdads or crayfish
I always loved the front claws that act as a shield of sorts. Great video as always.
The bog shrimp is may new favorite mutant
Fun fact. Bog means God in most slavic languages.
Nice
eggcellent
While you’re certainly right in the case of the game, I would be careful before you apply human dimorphic traits onto crustaceans. I’m not entirely sure myself, but since in the insect and reptilian kingdoms often females are larger than males and more territorial I would be careful before projecting mammal traits on something alien from that kingdom. Still, amazing video !
please do animal videos on monster hunter world please
“In metro russia, shrimp eat you”.
Just found your channel sir, good stuff
Glad you enjoy the content my dude!
Dude you were right about the genders metro exodus confirmed this in artyom's diary
Gotta love biology and science! Thats pretty cool to hear!
I'll never look at Sea food the same way again.
imagine eating a 200 lbs shrimp. 10/10 would eat
10/10 needs extra butter
And Beer since according to the fisherman, they Do make good eatin Only with beer. Lol
In Soviet Russia shrimp eats you
Best part is Metro Exodus confirmed it is sexual dymorphism
yes but do you know why? ;)
When a biologist reviews game lore
Crawfish👏are👏mini👏lobsters
Don't @ me
Metro shrimp vs Fallout mirelurk
My mom used to work in a restaurant where they'd cook live crawfish and she hated it cause they'd scream. She saved one who was a runt right before he went into the boiler and brought him home for me to keep as a pet. His name was lucky. He actually lived a long time. Several years
I'm early finnally.
How much Radiation do you have to eat before it makes your crawfish turn big?
Eat too much and you’l get sick
Shrimps are pretty rich
Do a video on the swarm
Soon
Amazing videos! But Roanoke, i wonder. I've always been extremely curious about Metroids and i think that might be a good idea for a video!
I would need to get a switch I believe but first a PS4 so I can start breaking into those!
Well with videos like these you're well on your way! Keep being awesome!
Crazy thing is, I'm watching this right as I'm encountering these mutation crustaceans I'm game!
Because of these videos, I decided to play metro last light today
ayyyeee have blast man! they are great games
Roanoke Gaming they are great, but I will say they can be somewhat tedious at points. Like in 2033 I was constantly having to watch how much ammo I used in a fight because I ran completely out a lot. Now in metro last light I gotta keep referencing a moral points guide on TH-cam to make sure I get those points! XD
I am watching this video very much katet and in Metro: Exodus they basically confirm your theory of Gender Morphism, which makes sense because that's gow nature works, for ex: A male bird are usually brighter colors in the hopes of attracting predators because they don't carry young and are generally bigger than a Female.
I reckon the little shrimp are larvae, and the big ones are adults.
Their overall body shape, with the extending lower jaw of small ones and the small body and long tail of the big one, reminds me of a dragonfly.
Resident evil T virus and G virus vs left 4 Dead green flu . Resident evil Infected dog licker Hunter camma infected lion ivy zombie g adult Mr x William birkin and vs Left 4 Dead common and uncommon and special infected Boomer Hunter smoker spitter jockey charger witch tank
Restaurant guy: What would you like?
Me: A shrimp
Restaurant guy: How would you like it?
Me: Giant mutated please
Edit: this is what he gave me
*He gives me a human sized shrimp with strong armor*
Me: Just how I like it!
With the release of *Metro Exodus* and its updated models for its various mutants, we can now pretty much confirm that, yes, Shrimps are indeed mutated crawfish.
Out past Moscow in the waters, Shrimp can be seen milling about. The females and males are seen to resemble their unmutated ancestry much more prominently than before, basically just being gigantic crayfish.