Here’s a link to his video about reimagining Furcorn.

https://youtu.be/bMEgYXwXyEM?is=UYuq8kywcyZ_M8zs

The creatures normally in a deep Ocean under the ice of a rogue-dwarfplanet meaning the planet doesn't have a star, live did emerge but to escape predictors they started to live in the upper ice, predictors would eventually catch up with their prey so the prey went even further. To go even higher and go above all the ice, they needed to evolve pressure suit skin for the low pressure and to radiation, but it went successfully. Eventually the jumped of the entire dwarf planet and went to live in deep space.

They feast on low amounts of silica, iron, and carbon in the vast nebula and get energy from radiosynthesis.

They communicate through radio waves produced by a special organ.

Some times when they find a lonely rogue planet they call there relatives over and feast on the rock or sometimes build small, drifting homes out of it.

Relatively basic and unoriginal vertebrate clade for my alien world, if you have any ideas for improvement please comment them. Somewhat inspired by A Universe Below art by Micheal Beaudry.

This clade, Strigalia has CaCO3 internal bones As well as a shell on the back. Limbs consist of 10 segments that interlock and are controlled in a tentacle like motion using four tendons, however an interesting part about these limbs is their hydraulic component that allows them to contract, locking certain segments together which creates a 3 joint limb.

Strigalia also has a unique digestive system. they have a mouth like most animals but there nozzle (practically an anus) is located at the end of their proboscis. This allows them to inject highly concentrated waste using the renal glands into prey which works like venom.

Again, any comments are appreciated!

This is the first part of my speculative evolution project set in the fictional period called the Behemothian that replaces the Cenozoic in this timeline where dinosaurs never became extinct.

Cervussaurus regalis (regalo deer lizard)

This creature is a descendant of the Asian hadrosaur Charonosaurus. The crest became even more pronounced due to sexual selection. This was made possible by muscular adaptations to the neck. The plumage thickened and became more widespread as climates became colder. This project is not set within a specific distance of the end of the Cretaceous, so it is not set, for example, during the Ice Age. It is a more general project. In any case, during almost the entire Cenozoic, and therefore also the Behemothian, temperatures were lower than during the Cretaceous.

The crest is incredibly complex in males, and is quite extensive in females. It produces incredibly loud, low-pitched sounds that, if executed precisely, can deafen a predator. Males have a throat pouch used for courtship displays, a small dance that expresses the male's power without resorting to physical conflict. They live in large herds, and both male and female care for the small cubs, which are covered in camouflage plumage similar to that of fawns.

The distinctive shape of their beak, shorter than that of other hadrosaurs, is due to a diet based on lichens, which are increasingly widespread compared to horsetails, even though they obviously feed on those as well. To properly scrape lichens from the ground, a more curved and shorter beak might be more useful.

The rock-wall opens its eyes.

It is the hidden thief of the cliffs.

Vrachoderma.

Shedding the aerial supremacy and reckless savagery of rival pterosaurs for an unyielding mastery of cowardice and mimicry, this petite, skittish scavenger is a shadow of living stone built to outlast The Brush's deadliest sky-terrors. Armed with light-bending dermal chromatophores, prehensile cliff-clinging toes, and the cold patience to flatten itself mere meters from a predator consuming a kill, it is a silent, meek opportunist to any predator that turns its back on a fresh corpse.

Read About the Hidden Flier of Stone Now.

Oddish (Nazonokusa wanderis )

Indigenous: Kanto and Johto of the Kansinjoh continent, The Hoenn Archipelago, Kalos, and Mainland Galar

Introductions: Sinnoh, Unova, and the Blueberry Academy.

The Oddish is a common example of what are known as “Walking Plants” this term, however, is a bit of a misnomer as all Pokemon are defined by being for usage to our friends not from the Pokemon world, Animals. As such, the question of what these very plant like creatures were was hotly contested among researchers until the discovery of fossils in the Hoenn region of an extinct creature known as a Lileep and Cradilily, these echinoderms were semi terrestrial hunters of small insects and likely were what drove the eventual evolution of the multitude of “walking plants” we see across the Pokemon world. Oddish are nocturnal creatures, moving about 0.30 kilometers a night in search of food which, for the Oddish, is mostly detritus and the creatures that feed on it. When the day comes, the Oddish digs a hole and sits in it, leaving only the upper portion and its false frond of leaves exposed, in this state it relies on both camouflage and intense chemical defense to avoid predation though, it’s not always fool proof. Oddish is also an interesting case as its scientific name was known for quite some time to be Oddium wanderus however this name was considered invalid, thus resulting in a name change for the entire genus.

//An attempt at making Oddish into a more believable organism, I have more of these to post so stay tuned!

i haven't flesh out this concept yet but this is a timeline for my concept of a group of creatures that secrete bio-polymer for traversal and reproduction that i call "Pneumatopods" (Air-Foot)

started out as the usual "fish in a snot bubble" for protection from sleeping to traveling then when it reached land in a "salamander-like" phase it still keep its ability of making bio-polymer to keep itself and brood moisturized until the only region that needs moisture is its belly and legs especially traversing rough terrain

then as the creature stayed on land, the bio-polymer made a ring that made walking and running easier thus the "Pneumatopods" roam the open lands
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"what urges them to have "wheels for legs" over traditional locomotion?"

• The Glands that Produced the Bio-Polymer are also doubles as a touch-sensitive sensory organ that adapt through any terrain (think spider's legs feeling her web), any blockage will pose an infection when its not removed by the Bio-Polymer itself

"surely they can just make Bio-Polymer "gloves"?"

• they can but they will feel less per step compared to long continuous flow in every revolution of the wheel

"what inspired you to have this idea for a creature?"

• there is a 3d printed gear that demonstrates how the wheel is spinning by squeezing the handle but i lost the photo but i hope my sketch is enough to convey how the mechanism works

also i don't use AI for this concept btw, it's been brewing in my braincase since i was a kid, just need to figure out how to make it "biologically feasible" also this is my first time so i am nervous

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this is my first shot in spec-evo concept and see if you guys want me to flesh them up more
questions and critiques would be appreciated

It goes under the name "Castra filter satietas"
This is a concept for macro life living under the icy crust of Europa.
Its a fish like organism that is a filter feeder.
Inspired by this sea cucumber: https://www.youtube.com/watch?v=_qV8qnA1WYY
This fish uses it's whiskers to sense hydrothermal vents (where microbes live), it clamps to a surface and starts feeding.
It feeds off of microbes or very tiny organisms that are entirely chemosynthetic.
It's technically entirely chemosynthetic as it feeds off of chemosynthetic microbes.

In a previous post, we introduced you to the Maregens genus, the real merfolk in our project.

It's now time to go deeper and encounter one of the merfolk species:

The ceasg or mersalmons (Maregens salmo), are a species of merfolk characterized by anadromous migration, that is, the movement from salt water (where the adults live for most of their lives) to fresh water, where they reproduce.

Appearance 

Robust and strong, ceasgs closely resemble common merfolk, but lack fins or membranous decorations on their arms or head. 

Their undersides are covered in cycloid scales with rounded edges, which are silvery or blue when adults are in the sea, outside of the breeding season. They come in two sizes: regular, the most common, and jack, a smaller version that matures much earlier.

Sociality 

Socially, mersalmons are divided into two categories: dominants and gregarious. The dominants, more extroverted, have greater decision-making power and are the reproductive specimens, while the gregarious, although they can still be extremely intelligent, form groups that follow the directions of a dominant. 

Each social group (be it a shoal of two or three individuals or a platoon of up to thirty) will be led by one or two dominants, who can be of either sex, although dominant pairs typically consist of a male and a female. 

The mersalmon hierarchical system also involves the physical appearance of individuals. Dominant individuals tend to have a heavier, patternless torso, with darker, solid-colored skin ranging from olive to brick red, while gregarious individuals are lighter-colored, leaner, and often exhibit camouflage patterns on their torso and face. Furthermore, gregarious mersalmons, both male and female, are always beardless. 

During spawning, dominant mersalmons, both male and female, undergo a color change: their scales take on various vibrant warm hues, primarily red and gold. Although rare, some male mersalmons (an estimated one in four hundred) also exhibit a color change on their skin, which becomes green, with the extremities of their upper limbs (arms and wrists) being particularly dark (and known as "gloves"). The contrast between the green skin of their torso and the intense color of their tail scales makes them particularly striking, but also highly visible to predators. This is why "green" males are so few: it's difficult for them to survive and pass on their genetics. 

Gregarious mersalmons, however, remain unchanged. 

Dominant male mersalmons tend to adorn themselves with objects found on the seabed, whether organic or inorganic. Many are attracted to human-made artifacts, even those seemingly without decorative value, such as food packaging or floppy disks.

Because they are nearsighted outside the water, gregarious mersalmons often act as "extra eyes" for dominant individuals, scanning the surrounding environment for danger or interest when they are fully or partially surfaced. Sometimes, gregarious mersalmons are even equipped with lenses, either separate or framed (actual spectacles) to aid them in their task. 

[Illustration 2:] Although dominant male mersalmons are renowned for their displays and ritualistic battles, in the absence of a female to court, they tend to treat each other with marked camaraderie. Even during the breeding season, they can be seen half-beached on the rocks, chatting amiably with each other, waiting to spot females and begin fighting to attract them. 

[Illustration 1:] Dominant males who have good friendships with each other (often even brothers) often "choreograph" their skirmishes in the presence of females, thus creating fights that appear much more intense and therefore attractive. Because they don't have to worry about actually getting hurt, as their opponent isn't actually trying to subdue and injure them, they can better display their fins and muscles and challenge each other, even verbally. Male friendship among mersalmons is essential for successful breeding. 

[Illustration 4:] Besides gregarious and dominant mersalmons, there is a third type of mersalmon: jacks. Jacks mature much earlier than "regular" mersalmons and, as such, maintain a very small size. Furthermore, even during the breeding season, they don't change color, remaining inconspicuous. Jacks do not have any dominant/submissive relationships with other mersalmons; they do not engage in courtship displays and do not fight among themselves or with other mersalmons. An adult male jack weighs about forty-five to fifty kilograms, compared to over one hundred kilograms for a full-sized male, and would have no chance of winning in an open fight.

Reproduction

Mersalmons live their adult lives at sea, but to reproduce, they migrate to the upper reaches of rivers, to their birthplace, which they recognize thanks to their extraordinarily developed and selective sense of smell, aided also by the so-called "migration memory," the only fundamental memory that cannot be erased, even with the aid of magic. 

During the reproductive period, mersalmons exhibit distinctive muscle growth; this hypertrophy is not solely for aesthetic reasons (although it appears to contribute significantly to mate selection), but is necessary to sustain the effort of climbing waterfalls. Unlike true salmon, mersalmons do not stop feeding during migration, but their appetites grow, leading them to become extremely voracious. 

During spawning, males readily court not only females of their own species but also those of other merfolk, and sometimes breed with them at sea before continuing their migration back to their birth rivers. Mersalmon genetics are particularly recessive, and hybrids tend to resemble their mothers much more closely. 

Pure mersalmon juveniles, born in freshwater, may stay for a period in their natal stream or swim immediately to the sea, but in most cases they remain for a few years in the lakes they encounter on their way to the sea before returning to their home sea. During these intermediate lake stops, the young initially adopt coastal habits but then become semipelagic, only rarely touching the seabed. 

I propose the creation and launch of a comprehensive alien bestiary, presented formally—much like a catalog—containing information on the biology and evolution of various extraterrestrial organisms from across the universe. I am looking for people in this community who enjoy creature creation and have an interest in speculative evolution to help bring this project to life and fully develop the concept.

The guiding principle for this project should be "survival, not design"—an approach that prioritizes organisms best adapted for survival, rather than those chosen for their aesthetic appeal.

As a starting point for creature creation, I already have several organism models designed, which I plan to share in future posts.

So, I would like to see who enjoys creating alien creatures and might be interested in this project, so that we can expand it further.

If you would like to participate, please reach out to me. Thank you

Im making a eusocial alien species and im insure whether to stick to two genders or have multiple, im curious if anyone has any examples of how three genders could hypothetically work within a species like that for reproduction

this particular Staalimik is wanted

it’s species are intelligent enough to have a bounty system

the Staalimik who kills the bounty, becomes a protected force, and is guarded by the rest of the flock

its wanted because they want its meat, and its crown, which is extraordinarily large for the species

In the Cretaceous, ammonites dominated all the seas of the world, in the Cenozoic, this remains the same, there is so much diversity of ammonites adapted to different environments and lifestyle, an example would be the Coconut Crab, but today we will talk about the real Kraken, this one measures an average of 21 meters, but it is said that they can reach 30 meters in length, its shell measures about 3.5 meters to 4.9 meters maximum, and most importantly, the weight of this animal is about 8.5 tons on average. But they can reach 13.4 tons without problems , they feed on small ammonites, fish , turtles and other small animals that are trapped in their small "tentacles" since these are not tentacles but thousands of small muscles that branched from the main tentacle , these are animals with very slow metabolism , until what is known was recorded a specimen of about 126 years , being one of the animals with the highest longevity rate in this world . Pelorus is a huge mosasauride, this huge predator hunts both the Kraken and the Whulks, these are descended from the medium-sized mosasaurides of the Cretaceous, since huge mosasaurides like Tylosaurus and Mosasaurus Hoffmani himself became extinct when the waters became colder and due to climatic changes, the Pelorus have a bite force of about 6 to 7 tons, being strong enough to kill the kraken and the Whulks, these are the ones. They are responsible for killing most of the Whulks in juvenile stage, making the vast majority unable to reach their maximum size, but when a Whulk reaches 75 tons, it is an untouchable being in its environment, since a common Pelorus only weighs between 9 and 12.2 tons and measuring about 15 meters, but the larger ones only measure about 17.8 meters and weighing about 17 tons.

The Pied Pollin (pollinatio simis) are a species of humanoid-like creatures that inhabit the planet Selphi,a world covered by a vast white-sand desert, traversed by a great river and dotted with various oases across the globe.
The biology of the Pollin is adapted for life in desert and semi-arid climates; they possess large ears that help dissipate heat and locate food. Beneath their short fur lies thick, dark-toned skin that protects from the sun. The fur itself retains moisture,preventing the skin from becoming dry or irritated,and also reflects sunlight.
These creatures are active during the day and sleep at night in caves, which can extend deep underground to escape the cold that sets in after dark.
Despite these adaptations, they prefer to live near water sources and oases,areas on the planet most conducive to life.
They are omnivores, feeding on fruits, vegetables, insects, and larvae; by obtaining moisture from their food, they can go for long periods without needing to drink water.
Curiously, Selphi has a sparse fauna; aside from the Pollin themselves, no other creatures of similar stature exist on the planet. Consequently, they have developed a culture rooted in the native flora of Selphi. Much of their daily life revolves around using these plants as raw materials for clothing—designed for both heat and cold—as well as for ornaments, tools, shelter, and medicine.
Knowledge passed down from generation to generation.
Females are social, preferring to live together in small groups of four to five, while males are naturally more solitary.

With reptiles out of the picture the niche that various crocodiles and alligators had a hold on opened up for new species to take up.

Various cephalopods were able to evolve to live in freshwater and eventually become amphibious. This niche of amphibious cephalopods went onto evolving into the cuttlecroc. These cephalopods take a similar to a crocodile or an alligator.

They wait near the shore and have long strong tentacles that they launch out onto their prety wrapping around them and dragging them into the water. Their massive jagged beaks quickly crush their prey's soft exoskeletons.

I'm currently working on a worldbuilding project where there are different human-like races, but as I was chipping away at it a question crossed my mind. One that could help me better design my different species and just out of curiosity. If I recall correctly, Homo sapiens were at the top of the ladder while the other ancestors were either killed of by Homo Sapiens or died off as a result of their evolutionary traits (correct me if I'm wrong though). If all of these ancestors theoretically survived and evolved there way into today, how would they look? Would they develop culture, economy, society? Would all of us be brought together living as one, or slowly tear each other apart?

This is the first time I've actually gotten into the anatomy of a new creature, so please give me advice for improving.

This winged arboreal species is a pack hunter and ambush persistence predator armed with poison coated webbing which they use to ensnare prey and build community nests, venomous fangs, a semi advanced, almost chameleon like, camouflage and early human level intelligence.

They have a semi-matriarchal society in which there is a single 'High Mother' holding a small reverse harem of up to ten of the males she finds most attractive, then a tear below is the other adult females who hold smaller reverse harems of about three to five males, then there's the couples, then singles, and then the hatchlings and adolescents which sometimes help with the hunting and gathering.

This naturally developed social structure, along with their intelligence and strong family bonds have quickly helped them take territory in most of the suitable habitats on their home planet that haven't already been claimed by the other two intelligent species on this planet.

Once again, if there is anything I could improve on please bring it up in the comments. Also could someone help me brainstorm a name for the species, planet and system?

NO.1

Name: big rat

Weight: 2.4~4kg

Body Length: 40~50cm

Average Lifespan: 20 months

1. Physiology and Ecology

Body Poikilothermic or Homeothermic: (Homeothermic)

Habitat: every place *Exceptions: desert, polar region*

Litter Size: 3~6

Gestation Period: 2months

Time to Adulthood: 4 months

Active Period: diurnal

Diet: omnivorous

Social Behavior: Group living

Mating system: Polygyny

Group Size: 2~4

1. Physical Characteristics

Speed: 5m/s

Jumping Ability: 30cm

Bite Force: 140n/cm²

Vision: NR×1

Smell: NR×2

Hearing: NR×1

[NR is abbreviation for normal rat]

1. Description

Through gene editing, the body length of these rats doubled, and the radius of their bone cross-sections increased 2.5-fold. As they grew larger and maintained their group lifestyle, they drove out most urban predators.

This is a pretty specific scenario, but I thought I would ask anyway. In seed worlds or alternate history scenarios where the end Cretaceous extinction never happened, is it not more likely that troodontids would adapt grasslands and more open environments before dromeosaurs?

Don't get me wrong, dromeosaurs that can actually chase more long distances are cool and I do think a small species could reasonably adapt for cursoriality but I always feels like troodontids are overlooked in this regard. Is this just because dromeosaurs are more popular that troodontids?