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Spoiler alert. There is a go out of jail free card for subnautica unrealistic and unrelated creatures. - The world is after a khara epidemic that most likely killed 99% of organisms. - There were aliens that could have brought animals from different planets.

I absolutely love your voice. Cool video, not really in the mood, but I wanted to help you out in the algorithm because this genuinely seems really interesting, and you have a really cool voice so.

Im also a new biologist and man I wish i would have come up with an idea like this. Very solid work.

Funny you should say that small animals can hide in crevises from reapers becouse my current strategy for crash zone looting is zipping around with my glider and hiding behind/under the rubble when i get attacked and it works like a charm

Please do more! Love to hear more, biology is so interesting The island to Atoll part got me like so shook. I’m playing the game and getting too much close calls with Leviathans 😭 I got chased by like two crabsquids How would you find a logical explanation to the void considering irl stuff, like realistically there’s no way the entirety of the planet can be that deep without life and stuff? Right?

a planet with no tectonic activity would either be cold on the inside like mars, meaning no magnetic field and resulting in a barren planet with little atmosphere, or have global resurfacing events like on venus which would periodically flood the entire planet with lava, suffice to say neither option is ideal for life

Hi Cozumel! 👋 💕💕💕💕💕

"there are many benefits to being a marine biologist"

Could you do a vid on below zero

@DeLo I guess you found what sticks 😂 congrats

As with most video games, I imagine that in-universe the area represented by the map is actually much larger, and simply shrunk down for the sake of playability; this would explain the proximity of the different bioregions to each other, and would be more in-line with what we see from space

You should play below zero. Many people believe the original game is better and I agree, but the environment in below zero is beautiful

When I saw this video on my page and watched it, I thought about checking out the comment section, then I realized how underrated you are. It’s the first time I saw Your video and thought you had at least 50 thousand subscribers. I love the way you describe these things and would love to see more, especially more subnautica but also more games! Love your work, I hope you get recognized more because you deserve it, good luck!

It think the bacteria killing off so much life may explain some of the hole in the genetic trees.

When I first started playing Subnatica, I really struggled. Not because of the marine biology. The safe shallows look like any reef I have snorkeled. And having 45 seconds of air seemed reasonable too. Where I struggled was with swimming very deep depths without being crushed. The idea that you can open the hatch on your sub and swim out over a kilometer down isn't realistic, and I struggled with this until I just accepted it. Recently while playing hard core and in the lava zone, my Prawn suit fell into a deep hole. At over 2 kilometers down and no end in site, I exited the suit to swim to the "surfaces", or actually my Cyclops which was at about 1200 meters. But at that depth, the pressure is 3,000 PSI. I know the reinforced diving suit is awesome, but 3,000 PSI?

I completely understand not wanting to show your face on camera, but I am curious: If you still wanted to appear, but would only do so in stills... why bother with the hat, scarf(?), and sunglasses instead of just creating a fake head to paste over it? :P (Or, for the context of this video, put a diver's mask in place of your head lol) Regardless, very interesting video!

Considering the mass extinction event due to the Kharaa, we're likely looking at a VERY broken life system here, where normally MUCH more would exist, likely even things to explain this stuff. For example, why do Sea Dragon leviathans exist at the scale they do? Easy, there was a LOT more reaper leviathans back in the day, and there was a lot more food to sustain reaper leviathans back in the day in general. Why do the Ampeels and Crabsquid have electrical abilities? Well, its not IMPOSSIBLE that a living battery could exist its just not on earth as there isn't any need nor any conditions weird enough to create life that can do that: aka No evolutionary pressure. Though yes, the ampeel should not be visibly electrical I imagine thats for gameplay sake. Why do crashfish die? Well, this is harder but its likely that its a similar explanation to Creepers where they spread spores to reproduce, and the fish itself has kind of been assimilated. We know for an absolute fact the Kharaa is an infestation, which is a bio-technological(Technology that exists purely out of organic technology and nothing else) species that assimilates others into utilities. Its not impossible it merged two incompatible species at one point to make a weapon which the crashfish represents. Alternatively, Crashfish could have a funny diet that just so happens to make gunpowder and over long periods of time ended up producing eggs within the plant and coincidentally evolved a button that causes them to either cause a chemical reaction or just heat up their bodies when distressed that it just... worked? But yeah crash fish are bs, this is just me guessing. And, the Gargantuan Leviathan makes sense only if you consider that it once had a HUUUGE Amount of food regarding leviathans which, Im pretty sure a PDA mentions outright. But, out of everything, the Gargantuan Leviathan makes less sense than the crash fish if you think too hard about it. But, It COULD have maybe existed as a beast that regularly goes on hibernation which only comes out when it needs more sustenance for a spree of slaughter that sustains it. There is also the possibility they're like some lobsters where as long as they remain successful, they survive. And with it so close to the lava zone, they very easily could have died while hibernating. And also that one we found could be an absolute freak who survived through being a complete and utter tyrant of the natural cycle by being too good at hunting that it only died of starvation. And as for the three having arms? (Cutefish, Dragon, Emperor), those three all have notably higher intelligence than ALL of the rest of the entire ocean. Emperor Leviathans are literally sentient and arguably above human intelligence and known to be very very capable of understanding complex systems like using the peepers to feed the entire crater and possibly influence the peeper's evolutions... Sea Dragon Leviathans are capable of fire breath likely as a result of their ecosystem being a literal lava zone and having the ability to tolerate severe heat may allow them to do a funny equivelant of the dinosaurs where they eat rocks except unlike dinosaurs they are eating liquid rocks and showed signs of intelligence in knowing that destroying an entire fortress would avenge its children(this one is arguable) and the cutefish is literally a companion which indicates enough intelligence to be friendly and capable of learning tricks like high fives. All of this indicates that theres a few roads: The emperors guided their own evolution and a few others(Unlikely), they evolved from a landmass that favors hands(Likeliest if you look at sea dragon leviathans) and/or notice that the "arms" of the cutefish and emperor leviathan are just long and extended fins indicating that they probably evolved bigger fins to be able to exert more force when swimming to move less slowly or they come from common ancestors. The one and only undeniable case of "They absolutely might be realistic" is that the Sea Emperor Leviathans are literally sentient and very likely would just be able to survive with how intelligent AND powerful they are. And you can see that not only do they control predatory animals near them but they likely are VERY long lived, so they could have influenced their own evolution. But that goes against the philosophy of the sea emperor we actually hear communicate with us.

Below Zero vid drops when?

I will say though, if 4546B does have tectonic plates, a kilometer long super ship crashing into it would probably initiate its tectonic activity.

One of my favorite games. I have hundreds of hours in Subnautica, and still pick it up again every few months. Thanks for this educated take on the realism factor of the biological aspects!

About the crash fish, could it be a symbiose (i think its the term to say 2 species mutualy help each other) between it and the plant? Like the plant give the crash fish the nutriments to give birth to his babies in the plant but the crash fish sacrifice itself fo protect the plant also creating space for the mext generation to grow. Maybe the plant implants seeds in the fish so when it explode, it would spread the plant seeds! Between, sorry for my bad english, i literaly learned english by copy-pasting games wiki in google translate.

I've never seen the Prawn Suit get grabbed.

I have no idea how sea dragons go so fast despite having frog hands and squid tentacles (but no squid jets???) also I love how depth and pressure doesn't affect the player at all haha

Hm, yes, very fish

great vid

I'd certainly be looking forward to playthrough videos of somebody who clearly has love for the genre and this game in particular. Provided you will read the information the game provides for you. There's nothing more aggravating than watching clueless noobs stumbling around refusing to acquire the knowledge right in front of their faces.

5:46 Edit : 10:24 let's not forget things about this world. First off, this world was home to a species of really powerfull and old empire that lived across the galaxy. Nothing prove or disprove that they did not alter the world in a way or the other, like, for exemple, the piper that goes into the multiple drains all across the ocean floor of differents biomes, to scan and distribute cured piper full of enzymes. How does the piper work in such an environmental industrial world ? I think that some fish where moddified for personnal use, like for exemple, the pet fish does not seam to be natural or to possess a reproduction cycle. Second point is, most species from thos world seems to descend from a big variations of ray. But nothing stop the old civilisation from implementing species that are out of this world into the world of Subnautica. What i'm saying to your observations is : there's a big point to take into account, meaby all of the biologie of this world is not natural. If you have to take into account this, can your knowledge give you hypotesis for some things where you would thinks does not laje any sense ?

All my support for this kind of video. Loved it

How about comparing this stuff with PDA records and AI messages? There is a fair amount of content, especially related to Bart Torgal. And oh, can there be a word about the Khara in all of this?

I learned something.

You KNOW the game is good when the sequel trailer drops and everyone replays the decade old original

about the tectonic activity I see your point, but from the same shot (rocket launch) we could see oceanic ridge (lighter blue), which would suggest tectonic activity

As that one comment said. I would 100% watch that 4 hour video

9:05 this is due to them eating molten rocks to spit out, they don't biologically produce the fire

I mean a big reason the creatures seem like one offs could be because the bacteria tanked the larger biodiversity of the area and the reason that there are so many big creatures without the proper things to keep them alive could be from this same reason, same with the ghost leviathan, it's aggression could be because of a creature that just didn't survive the bacteria and they had no reason to lose that trait. I mean these are all just thoughts and what if's about it. Love the video and god I love this game.

For Subnautica 2, I hope they take notes from how community management was done for Satisfactory. Jace changed the game

Not super smart on this but for your first point; with no tectonic activity, wouldn’t that also mean no magnetosphere? Without protection from the solar wind, the atmosphere and most of the surface water should be quickly stripped away, and at the very least, radiation would kill all complex life.

thank you for this video we need more of this type of content!!! your channel is a hidden gem

There are some drawbacks to being a marine biologist

the sea dragon does not breathe fire it eats magma a Spit's ot out at the player

10:26 but... tou could certainly try, dont you think ;)

There is actually an in-universe explanation for the evolution of the variance in eye numbers! Biters and Blighters are both related to the fossil of Specimen Theta in one of the Lost River precursor labs, which has four eyes. Specimen Theta also has armor plating, giving a connection to Sand Sharks that also possess four eyes, and Bonesharks which must have broken off earlier in the evolutionary tree as they only possess two eyes. Following the Sand Shark connection we can find that Specimen Theta is a VERY distant relative of Rockgrubs, as the PDA notes in the Rockgrub's entry that it is likely a distant relative of the Sand Shark. While this doesn't give an exact reason for why the number of eyes varies so much, there is at least a clear evolutional progression shown here. Additionally, if counting Below Zero, the Glow Whales have a pair of 'pseudoeyes' behind their main ones that seem to provide a connection to this family as well.

Is it feasible that 4546b simply has much less active plate tectonics in comparison to Earth rather than completely lacking them? The presence of the giant mountains in Below Zero seems to suggest that at least *some* tectonic activity has taken place in the area

Me: depressed after watching the video realizing that 4546B will never be real

i love when youtubers do cutouts of themselves its cute

Rebranding as a marine biologist because your channel didn’t take of us crazy

btw the gargantuan leviathan went extinct thousands of years ago, likely due to its food going extinct also this mass extinction event is likely why a phylogenetic tree is so hard to make

I also went into marine biology , amongst other reasons aswell , because of subnautica <3 Just finished all the important colloquiums for the semester this week now waiting for the exams hahahah

You mentioned the body plan similarities between the Sea Dragon, Sea Emperor, and Cuddlefish… but did you notice the Reefbacks also belong to that group? They have vestigial "paddles" on their undersides, resembling those of the Sea Emperor. The Sea Emperors also cultivate a special symbiotic ecosystem around themselves like the Reefbacks do, and both species have forms of long-distance social communication. If I had to guess, I would say the Sea Emperors are more closely related to Reefbacks than they are to Sea Dragon Leviathans.

I love this video, I do have to say a lot of the time their explanation for why some creatures are weird unrelared one-offs is because they're adapted to a weird relatively newly opened niche, sincw the game is set after a relatively recent extinction event. It's not an explanation that makes a lot of sense but I appreciate that it's there. I also appreciate that a lot of the species ARE related and although sometimes the relations again makes no sense and is purely morphological, it's there and is often explained, like how rhe jellyshroom cave allegedly got separated for a period of time which is what lead to pink peepers (oculi) Another thing is, i agree the gargantuan leviathan didnt exist in this ecosystem, the lost river ecosystem formed around its corpse, kinda like a whale fall but of a creature so large that it formed an entire ecosystem. Now whether that ecosystem could survive 3 million years + an extinction event is more questionable, but yeah rhw lost river as far as im aware should be rhe oldest ecosystem in the game.