r/SpeculativeEvolution 56m ago

[OC] Visual resident of the desert (i swear it is not Birrin)

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Upvotes

at an artificial planet name Alsia, the place which its purpose is like an ark, preserve ancient technology and multiple intelligent alien species in case the galaxy fell in to chaos. this species live on a desert region of the planet. they offen trade with other region in the ark and later become their image as a wanderer trader. ( the grey thing on their neck is a small pocket)


r/SpeculativeEvolution 1h ago

Aquatic April [ Aquatic April day 5: Current] Torpedo turtle

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Upvotes

r/SpeculativeEvolution 13h ago

[OC] Visual Strange Friendships at The Edge of the World

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115 Upvotes

What


r/SpeculativeEvolution 5h ago

Aquatic April Bug/Star/Dig [Aquatic April: Day 2,3,4]

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21 Upvotes

r/SpeculativeEvolution 1h ago

[OC] Visual Q. Anthropophagous

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Upvotes

Human descendant with similarities to terror birds


r/SpeculativeEvolution 1d ago

[non-OC] Visual A Evolution of Rattile (By Tribbetherium)

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508 Upvotes

This is so amazing!!!


r/SpeculativeEvolution 4h ago

Antares Rivals of War Candle jumper nocturnal specialists of Danggetti

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11 Upvotes

This strange muppet looking creature is a candle jumper (kaih sua in Pon). They're closest relatives are the giant Shadow backs and they share a lot of traits with them, 6 sensitive eyes, beaked mouth feeding tentacles, a hard carapace. The biggest difference is of course size candle jumpers are around 100 kgs they barely have a skeleton instead relying on fluid filled tubes to support their weight. This gives them unparalleled flexibility.

Like most creatures on Danggetti they are predators and one of the few able to successfully hunt skyfera. Their eyes are hyper attuned to light and will seek out the bio lumenecent spots on the larval skyfera to devour them. Their odd coloration is actually camouflage in the dim light of the nests. Because of their sensitivity to light they are often attracted to settlements where they scavenge for food the Moroc consider them a pest, rummaging through trash, stealing food, scaring away Taugs. they can get aggressive in large groups but a simple flare will distract them long enough to get away.


r/SpeculativeEvolution 1d ago

[OC] Visual Sophonts of the Overworld pt.1

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482 Upvotes

r/SpeculativeEvolution 17h ago

[OC] Visual Flying Tentacled Goats

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112 Upvotes

Osteopteryx caprina


r/SpeculativeEvolution 10h ago

Help & Feedback Seeded world of rabbits: Malixian Bogstrider (Sylvilagus palustralis)

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24 Upvotes

Habitat: Northern Swamp Rainforests

Size: 7–9 kg (~2x the size of a modern European rabbit)

Diet: Leaves, aquatic plants, soft tree bark, fungi

In a land of deep water, and thick mud only those rabbits that could navigate this treacherous terrain survived. Over thousands of generations, the Bogstriders adapted to an semi-aquatic lifestyle, making them as comfortable in the water as they are on land.

Semi-Aquatic Lifestyle: Unlike their terrestrial ancestors, Bogstriders have webbed feet that allow them to move quickly across muddy terrain and even swim short distances to escape predators.

Elongated Toes and Clawed Feet: Their long toes spread out when walking, preventing them from sinking into soft mud.

Mossy Camouflage: Their fur is thick and water-resistant, often growing patches giving them a mottled greenish-brown coloration to blend into their swampy environment.

Gutter-Like Ears: Their ears have small ridges that help direct rainwater away from their ear canals, preventing infection in the wet, humid environment.


r/SpeculativeEvolution 14h ago

Aquatic April Aquatic April day 5: Current (Piedran banderensis)

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37 Upvotes

Piedran banderensis, also known as the Flag Goby, is a species of fish found all across coral reefs. They have a striking coloration, with a black and white pattern on both males and females, and a seasonally present crest on males, attached to the frontmost spine. This crest can be raised, but is attached only to a single spine, and so only becomes stretched when exposed to high levels of current. This means that, during the goby’s mating season, rocks exposed to high levels of current are hotly contested territories, as it allows the males to unfurl their crest and woo the females. The males that manage to best keep the current-exposed rock get the most females. Rocks exposed to currents are often not contested territories, as it proves inconvenient for other species. This means Flag gobys only ever have to compete with themselves in terms of mating and hunting sites.

These little fish are predators of small crustaceans floating in the water column, as well as those who come to graze on the coral of their rock. These fish, especially the males, are highly protective of the rocks, scaring away even larger coral predators such as sea turtles. Since they mostly protect rocks usually exposed to high rates of erosion, this absence of predators makes it possible for slow-growing coral, like creeping coral, to grow in a wider variety of habitats, since they now only have to contend with the current, and not as much with predators. When males secure a rock, they allow as many females as arrive onto it, mate with them, and kick them out. Females hop from rock to rock, even after mating, as males seldom let them stay for long.


r/SpeculativeEvolution 15h ago

Aquatic April The Grindylow

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42 Upvotes

In a world where the Cretaceous mass extinction never took place, and life from the Mesozoic has continued to evolve to the present, dinosaurs and other giant reptiles are not the only lineages that have been spared. One of the most common families of predatory fish in Cretaceous seas was the ichthyodectids, a group that includes the famous "bulldog tarpon" Xiphactinus. Now, 65 million years later, they have remained mostly conservative, but a few unusual species stand out.

The Grindylow (Ogrichthys electrogenicus), named after a British water monster, is already unusual by ichthyodectid standards in being a bottom-dweller. with its upturned mouth and wedge-shaped body being reminiscent of a sculpin or a blenny-- though at up to ten feet long it is much longer than any of those fish. When it does swim, it is sluggish and cumbersome. But it can still overpower large and fast prey, thanks to a unique, deadly weapon.

Nearly half of the Grindylow's body is taken up by electrical organs, similar to those of our world's electric eel and torpedo ray. Given the fish's size, it can generate a current* of up to a thousand volts-- enough to kill a person. The Grindylow's usual hunting technique is to lie partially buried by mud, waiting for prey to swim past. When a victim is seen, it releases a jolt of electricity, stunning or killing the unsuspecting fish and allowing the predator to eat at leisure.

When a female lays her eggs, the male takes them into his mouth, and does not feed at all during the time it takes the young to hatch. Once the young fish swim off, their electrical organs are not yet developed, and they do not gain the ability to hunt using electricity until they are about a quarter their adult size.

*Using a different definition of "current" for today's entry!


r/SpeculativeEvolution 12m ago

[OC] Visual Sophonts of the Overworld pt. 2

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r/SpeculativeEvolution 15h ago

[OC] Visual Needle Manery

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27 Upvotes

Needle Manories are a species of maned crustation, they are common in littoral zones of any bodies of water, and feed off barnacles, algaes, and plankton. Their exoskeletons are calcic. They eat their shed to restore minerals that would be used to grow out their sinew manes. Their manes are used to hide, and mimic anemones whenever they burrow/hide in coral and other crevices.


r/SpeculativeEvolution 11h ago

Question Viability of using non-fertilized eggs to protect fertilized ones?

10 Upvotes

This might already be something some animals do but I’m not aware, let me know if there are any examples.

I could see this with some kind of post-humanity domestic chicken descendent, it becomes advantageous to keep the ability to lay a large percentage of non-fertilized eggs as a way to hide the eggs with chicks inside. Nest raiders find their fill and don’t bother looking for the more hidden eggs as the energy cost to search for something that may not even be there isn’t worth it.

It would require a lot of nutrients to be available for this to be kept, so maybe domestic plants start to overgrow without humans to harvest with plentiful pests breeding as a result.


r/SpeculativeEvolution 16h ago

Aquatic April Aquatic April 5

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14 Upvotes

r/SpeculativeEvolution 17h ago

Discussion Spec evo novels and books

13 Upvotes

Are there any good novels featuring spec evo that y'all know about? I read a lot of creature feature novels, so I was wandering if there were any good ones that had some spec evo. Something like Fragment by Warren Fahy or Peter Jackson's King Kong. Would prefer something similar to those, but any recommendations are appreciated.


r/SpeculativeEvolution 13h ago

Aquatic April AQUATIC APRIL 1 - Skotella (Abyssal Algae):

6 Upvotes
  • Description: A family of thermally powered unicellular algae forming the foundation of many abyssal ecosystems.
  • Habitat: Found throughout Yore's abyss—both in tunnels and open expanses—thriving in high-temperature zones.
  • Appearance: In low concentrations, Skotella is invisible to the naked eye. But when dense, it turns the water black, often darkening entire environments or visibly flowing through tunnel currents. This poses no issue for the Abyss' often blind fauna, but it does affect bioluminescent interactions—such as prey using the algae as camouflage, or light-dependent plants facing disrupted reproduction due to their seeds being obscured. Darkened waters also present a constant visual challenge for modern exploratory submarines, impairing both lighting and even sonar functionality.
  • Sustenance: Skotella absorbs thermal energy from abyssal currents and/or consumes dissolved organic matter (marine snow). It synthesizes biomass using waterborne compounds like CO₂.

r/SpeculativeEvolution 1d ago

Aquatic April [ Aquatic April day 4: Dig] Raketooth

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40 Upvotes

r/SpeculativeEvolution 6h ago

Discussion Is there any speculative evo cartoons/manga (or just media with pictures?)

2 Upvotes

the title pretty much explains it but id love to see a speculative evolution cartoon or manga either creature or humanoid centric anyone got any recs?

(unsure which flair should use)


r/SpeculativeEvolution 21h ago

Aquatic April Amfiterra:the World of Wonder (Late Protocene:20 Million Years PE) Life at the Shallow Seabed (Aquatic Challenge: Dig+Star+Bug)

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14 Upvotes

r/SpeculativeEvolution 16h ago

[OC] Maps & Planets WEIRD PLANET VISITOR【PART 1】

6 Upvotes

Welcome to the world of WEIRD PLANET VISITOR

How many secrets does the vast universe hide? Unfortunately, that's none of Mr. M's business. He just wants to live leisurely as a space drifter, picking up trash, munching on snacks, and wasting his life. However, due to an accident, he ends up on a strange planet, caught in various troubles and dangerous situations. How will the unlucky Mr. M survive in this world full of unknowns? Let him tell you himself!

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PART 1

I suppose this is our first time meeting. How are you doing?

Because of a particular accident, I’ve been stranded on this planet full of bizarre phenomenons. How I got here is a long story, so I’ll try to simplify some things.

Once, I was an ol’ space tramp who scavenged scrap for a living. My journey began when I heard news of a fresh wreckage from within an asteroid belt, which I arrived at as quickly as possible. Unfortunately, I was not alone!

Many others appeared, all fiercely competitive to gather some scraps of their own. Fortunately, I was the first person to arrive at the site, so I figured I could grab some valuable pieces before the other scavengers would start becoming territorial.

 

The plan would’ve gone perfectly, had I not been hit with diarrhea…

Oh, don't worry about the toilet paper situation. I eventually came out. As for how I came out, I’d rather not tell. There’s a quote for this sort of situation that I dare not forget. “Use the bathroom before realizing there’s no toilet paper, and the consequences are serious.”

By the way, this is BUG: my assistant. He’s helped me solve problems anywhere at any time, although the one problem that he could never overcome was his annoying personality. He never understood social cues very well.

Once I get rich, I’ll swap BUG’s personality chip with something that can make his attitude more tolerable.

The harvest yielded surprising results. Many of the pieces were of superb quality. It would make me wealthy, no doubt! But then there came a problem.

Looks like people were territorial already!

BUG!

As scrap scavengers, we treat territories seriously. Taking scrap within a spot which someone else claimed is considered stealing.

I’ll admit, I am easily stressed. But whenever I need to calm these harsh feelings down, I dig into a tasty bag of snacks. …

Unless I accidentally spill them. (I didn't curse there. I just chanted a spell that grants relief.)

The beloved snacks! I could catch them in time. But as I did so, I flew into a panicked dilemma: Should I really continue blinding my problems with snacks, or face the issue by resuming my conversion with the other scavenger? The answer was obvious…

I got back onto my feet after picking up all the snacks, but it looked like Bug didn’t learn from his mistake.

Even though BUG is made from the most top-notch technology, I seem to have lost this battle…

BUG was about to snatch an invaluable piece of scrap - an abandoned airtight cabin - right before I could tell him to stop.

I wanted to apologize, but the other scavenger didn't give me a chance to explain…

Yeah, I remember scolding BUG that day. I really regret having him take over the ship without me watching over his actions.

But those were about to become the least of my worries…

For everything was about to change.

———————————————————— To be continued...


r/SpeculativeEvolution 1d ago

[OC] Visual Show me what you're made of! Details about the inner structure of Arcpunk's creatures!

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76 Upvotes

The biology of Arcpunk is often quite strange. But my goal is to rethink many things from the ground up. Of course, that doesn’t always work out 100%, and sometimes you just have to turn a blind eye when it comes to the actual feasibility of certain details. That said, even the less plausible elements usually have a background rooted in the Flux of the interdimensional - whatever that means (probably only the worldbuilder knows :D).
However, my goal isn’t to be different just for the sake of it. Many organs function the way they do because it’s the most efficient way. That’s why their mechanics are often quite similar to known principles, even if they might seem strange at first glance.
Plus, this is ofc just the start. There are many more details to be told! :D


r/SpeculativeEvolution 15h ago

Question How much specialist trait can my specie of semi aquatic human possibly evolve in a span of 800k year?

3 Upvotes

i made a specie of human specialist for semi aquatic life comparable (they diverged from homo erectus that get stranded on small island with on large prey forced them to go for more seafood diet) with simple trait like bone webbed feet , fat density , propotion and body size it pretty simple to evolve but what about special trait how far can they go within a span of 800k year here in my list i think of something like how will they ear adapt for underwater pressure , will they possibly have closeable nose like seal do is that too far? Also will high collagen diet from fish help them keep they youthful appearance and longevity too (im not really expecting it to do much but if they do that a nice bonus for me)


r/SpeculativeEvolution 1d ago

Ape-ril (Apes of April) Homo Manatus (Day 5)

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7 Upvotes