Questions tagged [creature-design]

For questions regarding the viability of a life-form design. These questions should focus on biologically plausible creatures.

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A creature has one heart per bodily extremity. How large does each have to be?

The creature has several hearts, each supplying blood to one limb. For all other intents and purposes the creature is human. Of the six smaller hearts, one supplies each arm and leg, one supplies the ...
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4 votes
3 answers
1k views

Anatomically Correct Rull? [closed]

An alien species (of name and provenance that shall remain unmentioned) have an exotic metabolism. They are apparently equally comfortable in atmospheres of oxygen, chlorine, or fluorine, and are ...
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-1 votes
0 answers
94 views

Anatomically Correct Moonstrider [closed]

For my first entry into the Anatomically Correct series, let me present to you the moonstrider, one of the mounts ridden by the Moonshadow Elves in the Netflix animated fantasy The Dragon Prince: It'...
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3 votes
3 answers
88 views

How can I make this squid dive all the way to the bottom and live?

I have created for my novel a planet with extremely deep oceans. The ocean water itself is fairly similar to the ocean water of earth (phytoplankton, zooplankton, saline content, aquatic microbes, etc....
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2 votes
3 answers
161 views

How does my primitive species make baby carriers?

The Maruvans (plant/flowerlike species) are a very primitive and use Stone Age level tools. They can make clothes out of tree bark but I’m trying to figure out how they would make a baby carrier at ...
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2 votes
2 answers
511 views

My creature mixes lye and sal ammoniac to cool its blood. How cold can its blood get before it stops working as blood?

Background information: According to various sources, the human heart pumps 5 liters of blood/minute at rest and 15-20 liters of blood/minute during running or exercise, 6,000 to 7,500 liters of ...
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  • 9,606
3 votes
1 answer
48 views

Could papillae or another muscular protrusion act like tube feet on a land-dwelling creature?

I am designing a starfish-like alien and I am wondering if a tube feet like design would work for a large land-dwelling creature? The creature unlike starfish has strong muscles in its limbs which ...
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8 votes
4 answers
757 views

How to overcome the hygiene issues of prehensile mouthparts?

Currently, I am designing a sapient species whose only dextrous appendages are their prehensile mouthparts. I am aware that there are some issues with this, but I can think of ways to avoid or ...
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11 votes
6 answers
4k views

Could a hive mind work for a non-insectoid species?

I have a terminte/winged ant based insectoid species, but it doesn’t fit in well with the rest of the universe. I was reading the Darksaber book by Kevin Anderson and thought that the Taurills were a ...
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5 votes
7 answers
237 views

Anatomically Correct Insect From Shaggai

For those unfamiliar with the Lovecraftian-inspired story, the Insects from Shaggai, aka Shans, are insectoid, sentient creatures with 12 limbs that can 'phase' into another organism's brain and begin ...
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  • 1,177
0 votes
0 answers
110 views

Does this creature have good head and neck balancing? Final(?) Draft

I feel bad and guilty for doing this one AGAIN, but I've improved and want to further perfect my hyperfixation character. I've learned more of how things work from previous iterations, now I wish to ...
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6 votes
3 answers
132 views

Shock resistant brains

Being hit in the head with a blunt object, or accelerating too fast (in a rocket) can cause serious brain injuries for people. There are animals who seem to fare better, like woodpeckers. Apparently, ...
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8 votes
5 answers
393 views

Could it ever become a custom for human women to breed with ogres?

I'm in the process of constructing a fantasy world that resembles our world and is predominantly inhabited by humans just like us, but which also contains ogres. The ogres in this world are between ...
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4 votes
3 answers
148 views

How to reduce the number of designed lifeforms whilst still giving the impression of an endless amount?

I am not sure if this is a worldbuilding or story writing issue but I am wondering how I can show the vast amount of life throughout a volume of space without having to go into full detail. There is ...
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3 votes
1 answer
127 views

How would human body evolve on a super-habitable world?

Assuming that a person can survive on a world that's super-habitable, with it's 1,5 atm atmosphere consisting in 38,4% of oxygen, with increased concentration of (~0,5%) hydrogen and (1,2%) carbon ...
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-1 votes
2 answers
104 views

Science of speculative biology [closed]

My animal lives in planet full of rocks, so it evolved a drill-like mechanism in his hand. What material is that biological drill made of that crack granite like stones with ease ?
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7 votes
8 answers
206 views

Why would a settlement set up shop INSIDE a supermassive creature's mouth?

In a story idea I have, there is a massive, stationary beast, with teeth the size of houses, a body as large as a continent, and an unfathomably large mouth (don't ask how it sustains itself, nobody ...
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21 votes
12 answers
5k views

Why would a supermassive sarlacc-like creature let captured prey wander around inside itself?

On a fictional planet far away from our own, there is a part plant, part animal creature of truly massive proportions embedded in the sand of a desert-like portion of the planet, kinda like a cross ...
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  • 1,177
10 votes
4 answers
1k views

Suitable chairs for hunched, digitigrade lizard people?

My humanoid lizardfolk are 6-7 foot tall digitigrades, some have a slightly hunched posture like Gollum/Smeagol. I'm wondering what kind of chairs that be suitable for these characteristics as well as ...
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  • 1,237
2 votes
2 answers
57 views

I’m making this story that has a blown up planet, and I’m trying to have some animals and creatures that live here that have changed or been modified [closed]

So In this story the main planet has been blown up way before the point of the story taking place, and well I have most of the architecture down I’m stuck on coming up with creatures to inhabit it and ...
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  • 21
0 votes
2 answers
563 views

What would a realistic wood-eating animal look like? [closed]

For context: The location is Earth, several tens of millions of years ago. A rat-like mammal began to adapt to digest wood. Slowly, they're growing bigger and bigger, and they'll fill in the stead of ...
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  • 1,658
0 votes
2 answers
66 views

Development of Firespines [closed]

The land of Dracori contains many magical creatures. One of these is the Firespline Landfish (also called a Terrakanthes). The Terrakanthes looks like a chubby lizard, with a ridge of magical spikes ...
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5 votes
3 answers
175 views

Anatomically Correct Night Land Monsters

The Night Land features a far future landscape, where the sun has gone out, which is made treacherous by the presence of various non-human "forces" and "powers", and monstrous ...
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-3 votes
2 answers
112 views

Anatomically Correct Hellmouth

The hellmouth is a great bizarre being that guards the entrance of hell. While only the face has been recorded, it is quite a face They have two mammalian head, with the two maxillae opposing each ...
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4 votes
3 answers
119 views

Plausibility of an Ecosystem Based on Giant Diatoms?

In this wildly divergent Earth timeline, a group of diatoms evolved to be up to a few inches across (rather than 2mm or less). With this group presumably developing some similar traits to organisms ...
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  • 1,916
7 votes
2 answers
211 views

What are the evolutionary advantages to have facial hair for both sexes?

In my universe, there are sixteen living species from the Homo genus: anatomically modern humans, therianthropes, vampires, wizards, trolls, orcs, goblins, gnomes, ogres, dwarves, giants, halflings, ...
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3 votes
2 answers
65 views

How does a short finless 'fish' move on land?

The fish of this world have been replaced with similar creatures with a highly conserved anatomy. They have only around 4 vertebrae in their torso. Their tail has a few more vertebrae, but still not ...
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6 votes
5 answers
2k views

How can I prevent wizards from creating their own private armies of homunculi?

The human body contains mana, the life force that can be used for use as a source for magic. The individual's capacity for mana slowly grows with time as the person ages into adulthood, finally ...
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4 votes
6 answers
2k views

Why would a language created by humans lack both the /s/ and the /z/ consonants? [closed]

In my story, there are a strange species from the Homo genus: hematophagous humans often called vampires (their scientific name is Homo haematophagus) (so, they are still humans, just not Homo sapiens)...
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2 votes
6 answers
665 views

Would glowing creatures be possible? [closed]

I have several creatures I either made up or based off of a mythical creature, but the major glowing creature in my world's forest is a night nymph. There are four types of nymphs in my world; Earth ...
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3 votes
3 answers
90 views

Would tall arboreal humanoids make good swimmers?

These are tall, sapient great apes that primarily live in trees, but come down for occasional food or things that catch their interest on the ground. By tall, I mean 6-7 feet on average, but because ...
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9 votes
13 answers
2k views

What could possibly be the reason for a creature to have multiple sets of nostrils?

Nostrils accomplish two things: They filter out impurities and particles in the air. Thanks to the mucous membrane and hairs which act as a maze for the air to pass through. Snot is later drawn in to ...
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  • 8,617
16 votes
3 answers
2k views

How reflective can a creature's body parts get?

I have a creature in mind that has almost no ability to turn its head left/right and has forward-facing eyes like primates and predators generally do. This would generally present a problem for a ...
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  • 4,407
6 votes
1 answer
102 views

Could a bird use toxic vomit to hunt?

I call it vomit due to the way it is being projected like it but would be something of a solution that immobiles and paralyses the pray. I know that the Fulmar chick uses an orange oil like substance ...
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3 votes
2 answers
161 views

Could a creature use reptile scales to fly?

I know that feathers evolved from scales, but I was wondering if a bird could have feathers that kept the scales' "hardiness". For this scenario I want to go over a few things. Evolution ...
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3 votes
5 answers
257 views

How is the Alien Parasite's Empire in my Story going to Justify Bans on Clone Bodies for the Parasites?

PREMISE: A sentient race of neural parasites is in a civil war between the Symbiotes, who've used their extensive knowledge of genetic engineering to alter themselves into symbiotes, and the Parasites ...
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  • 1,177
5 votes
4 answers
168 views

How can a creature literally born from magic be restricted in its magical range?

Mana pathways are a pseudo-nervous system that spreads itself throughout the human body and are what qualifies a person to be a mage. Along the pathways are mana gates, specific points that connect ...
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  • 38k
7 votes
3 answers
183 views

Born as mindless blank slates, become sapient as adults

My species is a eusocial race of insectoid aliens. The basic gist is only the Queens are sapient, and the soldiers and workers are non-sapient. To me it felt like there wouldn't be much of a society ...
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4 votes
6 answers
225 views

Psychological Consequences of a Symbiotic Relationship with a Sentient Symbiont that was supposed to be Consensual, but was not?

PREMISE: A sentient race of neural parasites is in a civil war between the Symbiotes, who've used their extensive knowledge of genetic engineering to alter themselves into symbiotes, and the Parasites ...
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  • 1,177
2 votes
2 answers
93 views

How does an exploding dragon's scale work?

I'm designing a unique dragon called Vehement Dragon, I need it to be extremely hostile to all life. It evolved a trait that put it high up on the food chain, this is the only dragon whose scales can ...
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  • 45.9k
0 votes
1 answer
94 views

What would a language spoken by a tortoise-like sapient species sound like? [closed]

In my world, there is a species of massive bipedal (with a hunchbacked gait because of their shell) turtles with human-level intelligence (I do not mean humans with profound intellectual disability ...
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4 votes
4 answers
443 views

Reality Check: Are these aliens feasible?

I'm working on a Space Opera novel featuring a group of aliens that call themselves Species 0001. Here's what you need to know about them: They are a species of squid-like aliens that evolved on a ...
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  • 1,177
3 votes
1 answer
50 views

Cursorial Adaptations in Tentacled Quadrupeds

All animals in this world are derived from an anatomy involving a tetrapod-like foreleg with tentacle-like hindlegs. This means that the hindlegs are substantially weaker than the forelegs, especially ...
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  • 11.7k
14 votes
2 answers
985 views

Feasibility of an "albino" in a species that has color-changing capabilities?

I have an alien I am designing and I want there to be an individual to be a play off of my main character (who is albino.) The aliens are, unknown to the human settlers, an enigmatically intelligent ...
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  • 657
9 votes
3 answers
289 views

How tall can trees get if water transport limitations are bypassed?

The setting is Earth, millions of years in our future. In this setting a species of tree has made an evolutionary leap, allowing it to bypass the water transport constraints currently thought to be ...
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  • 3,995
9 votes
5 answers
4k views

How do migratory dragons avoid being blinded by sun?

These dragons are as big as double decker with wing span approaching 20m measuring from tip to tip, they migrate in large numbers and fly at an altitude between 10,000m to 20,000m above sea level. ...
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  • 45.9k
3 votes
0 answers
129 views

How much damage could hoof fingers do?

The scenario we have is a creature with a body like the chalicotherium but with a little straighter posture, so it has a bit of hunch. It has hands but at the end of its fingers where our fingernails ...
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3 votes
4 answers
133 views

Survival on a dark hycean world

As a follow up to my previous question: Surviving a dark hycean world I ask this: how could life adapt to a tidally locked ocean world with thick atmosphere and perpetual storms? That's the definition ...
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  • 2,640
3 votes
1 answer
74 views

Could the gnatho/idiosoma exist in a large animal?

The gnathosoma and idiosoma are peculiar body sections that define mites and ticks. Unlike almost all other animals, with at least some measure of a head, these members divide the body into the ...
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  • 11.7k
2 votes
1 answer
89 views

How would a Salamander's senses work? [closed]

The salamander, or fire elemental, is a creature which lives inside burning fires. This is a rather unique environment for an animal to live in. Fires produce smoke, which is dark and noisome, and ...
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