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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Abiogenesis of solid-state organisms that reproduce through rock melting and magnetism [closed]

When looking for alternatives to the classic carbon-based life I often found replies on why carbon is still the most likely element to base life on because it can create complex molecules, it can ...
Lordoazza's user avatar
5 votes
5 answers
669 views

How could a ruminant become a carnivore?

I have a speculative evolution project regarding giraffes. For those unfamiliar, giraffes are ruminants and rumination is not viable for carnivory according to every site I have wandered upon in my ...
King of the Hounds's user avatar
9 votes
4 answers
570 views

Anatomically Correct Sea Serpents

This is a submission for the Anatomically Correct Series. Sea serpents appear in various mythologies. Mesopotamians have Tiamat, Greeks have Hydras,Jews have Leviathan, the Norse have Jormungandr....
ITM_Coder's user avatar
  • 1,401
6 votes
3 answers
1k views

Anatomically Correct Elves

This is a submission for the Anatomically Correct Series. Elves are a supernatural creature from Germanic cultures. Their appearances and abilities vary a lot in fiction and mythology but things they ...
ITM_Coder's user avatar
  • 1,401
4 votes
1 answer
153 views

Size cap of vertebrate fliers on "Flyers' World" (10atm, 0.5g)

On Earth, unlike what's often claimed, the largest current flying birds don't approach the size limit for flight with Earthly biology. Quetzalcoatlus might be getting close to the limit, though. A big ...
Tristan Klassen's user avatar
4 votes
1 answer
162 views

Anatomically correct Sandworms [closed]

This is a submission for the Anatomically Correct Series. Sandworms are a famous creature in fiction and mythology. Various mythological creatures are the Mongolian Death Worm and the Lambton Worm. ...
ITM_Coder's user avatar
  • 1,401
1 vote
2 answers
173 views

How can Metamorphosis evolve in alien vertebrates?

For an alien planet I'm making I thought of some creatures which are descendants of non-metamorphosing creatures with solid bones. These creatures however have a very diffrent life cycle than their ...
MewTheCatsaur's user avatar
6 votes
5 answers
644 views

Anatomically Correct Asian Dragons

This is a submission for the Anatomically Correct Series. In the culture of China and other East Asian countries, dragons are legendary creatures that resemble snakes with 4 legs. They are big and ...
ITM_Coder's user avatar
  • 1,401
8 votes
8 answers
4k views

Would there be any advantages to having all hands and no legs?

Essentially, the organism (Homo Armyus) has 4 arms, 2 placed at the shoulder and 2 at the hips. All bodily functions in Homo Armyus are the same as Homo Sapiens, just the arms are different. Would ...
Blue Skin and Glowing Red Eyes's user avatar
3 votes
1 answer
259 views

The absolute limits of photosynthesis [closed]

I have found that some crops, like sugarcane, have a photosynthetic efficiency of 12%. Using extensive genetic modification and eliminating all natural barriers, like light wavelength, chloroplast ...
Rhomaioi's user avatar
  • 822
9 votes
2 answers
182 views

Compressible satellite ears?

Essentially, I have a flying predatory creature in my world which is roughly the size of a raven and hunts at night, relying quite a bit on sound for echolocation in tighter spaces, hearing for both ...
ProjectApex's user avatar
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20 votes
18 answers
4k views

Justification for a Magic school being dangerous [duplicate]

Magic schools, most notably Harry Potter, have the trope of having a dangerous campus, and monsters hiding in different parts. Of course, parents would get angry and do would not want to enroll their ...
Crafter's user avatar
  • 2,595
13 votes
11 answers
2k views

How could a creature make its feathers or hairs glow?

The Context In the world I am designing there are creatures known as a Dazzling Griffin. These griffins act in a similar manner to some birds of paradise when mating, putting on elaborate displays ...
Kurtalmakthekoboldkiaser's user avatar
3 votes
2 answers
133 views

Can you make effective poisons/acids/flammables from basic ingredients that would be useful in fighting monsters?

Can you make effective poisons/acids/flammables from basic ingredients that would be useful in fighting monsters? I am writing a story about a MC who goes into Portals to kill monsters (Typical DnD ...
OsiriumWrites's user avatar
2 votes
1 answer
154 views

If the USA was hit by a bombardment of nuclear warheads, what would the landscape look like?

In my world, technology that could alter a living creature's biology (later called Lazarus Tech) became incredibly popular in many places, until the overuse of the technology cause countless millions ...
50calbulletshrimp's user avatar
3 votes
2 answers
100 views

What kind of creature would be able to provide nutrients to my floating plant mat?

My ocean biome is almost entirely covered by a mat of linked free-floating plants. You can read further details on my original question "What challenges must oceanic plant life overcome in order ...
LiveInAmbeR's user avatar
  • 10.6k
3 votes
3 answers
210 views

Can an organism have body structure materials that crumble upon being injured?

I'm working on building a species of wild animal, and I have several criteria in mind, and I'm looking for any glaring issues I may have missed that makes such a creature entirely infeasible ...
Harthag's user avatar
  • 4,123
1 vote
2 answers
164 views

Low gravity planet, insect niche design [closed]

I am trying to think of alternatives to arthropods as the small critters for the planets I am designing but I am unsure how gravity will affect their design. These creatures will fill the roles that ...
user avatar
15 votes
6 answers
3k views

Seeing in the Dark - Flashlight Eyes

Darkvision, or seeing in the dark. But how does it work? In my world, I've been envisioning darkvision as eyes that emit a color of light that most humanoids can't see. Are there any problems inherent ...
Firedestroyer's user avatar
1 vote
2 answers
157 views

Clothing preference and Skin type of race which can absorb heat energy via skin?

My alien race is able to absorb energy via the skin, like plants using sunlight for photosynthesis. The race eats a lot of food, like humans, But they need this absorbed energy for their proper inner ...
Sangeetha's user avatar
  • 457
-2 votes
1 answer
92 views

Alien biochemistry [closed]

My creature was alien which home was destroyed . It got into another planet similar to earth . Its organs are not like humans. It sustains itself with by passively drawing in body heat and the ...
Mmm Nmm's user avatar
  • 147
1 vote
1 answer
101 views

Human precursors design powered armor for invertebratre Cephalopod slaves that have lungs too, up-right or octopus-form?

https://ibb.co/Fqmb4tH. I couldn't use the upload option as its saying server issue. That is the picture of my cephalopod. I'm trying to come up with an idea for power armor for my octopus species to ...
NagaPrince's user avatar
9 votes
5 answers
2k views

How could the effectiveness of guided weapons be reduced against a non-paranormal giant monster?

How could the effectiveness of radar, heat seeking, or laser guided weapons be reduced during a battle between a monster the size of a 7 story building and the military of a small country. The monster ...
Aaargh Zombies's user avatar
4 votes
5 answers
345 views

What would be a realistic distance for Tank Buster helicopter to engage a giant monster from?

In monster\Kaiju movies it is common to see the military engaging giant monsters, using air power, at extremely close range. An early example of this was in the 1933 rendition of King Kong the biplane ...
Aaargh Zombies's user avatar
5 votes
2 answers
247 views

Black photosynthetic large active animals

Previous questions have addressed whether a large active animal could run off photosynthesis alone and the answer seems to be no and that it could only provide around 4% of the animals daily usage but ...
user avatar
3 votes
1 answer
160 views

Can I put a Biological Refrigerator inside an organism and use it to create a sub zero spray?

Create a hypothetical creature. It has the basic components of a refrigerator inside it. It uses this internal fridge to create liquid atmosphere which it can spray. For condenser coils it has some ...
Robert Robert's user avatar
25 votes
18 answers
7k views

Why do wild creatures carry money?

It's an extremely common trope in Role Playing Games (RPG's) for wandering monsters to carry lootable currency (gold, moolah, dinero, big ones, cash, large, green, etc.). Now, it makes sense that non-...
Robert Columbia's user avatar
9 votes
6 answers
2k views

Is there a most efficient number of arm-like appendages?

I have a number of intelligent alien species with a high number of limbs (from 6 up to 18) some with radial symmetry and some bilateral, in most cases the creatures can crawl using all limbs but when ...
user avatar
6 votes
4 answers
336 views

Manipulation limbs that aren’t arms

I have been creating aliens species for a while now, and the idea of a sapient, tool-wielding, spacefaring civilization that doesn’t have arms as we know them excites me. I would like my aliens to ...
Jane Doe's user avatar
  • 431
4 votes
1 answer
545 views

My creature's cells mix water and some of the stuff in pee to cool themselves. How does it get that stuff to its cells?

After reevaluating the creature that cools its blood with lye and sal ammoniac, I removed the middleman - the cooling chamber and use of blood as coolant - and replaced the potassium hydroxide/...
KEY_ABRADE's user avatar
  • 12.8k
9 votes
4 answers
1k views

Is there space in an average animal cell that I could cram some extra organelles into?

From what I can tell, there's lots of room available inside a cell; certainly, all the graphic representations of them I can find seem to show that a lot of the volume of the cell is cytoplasm, as ...
KEY_ABRADE's user avatar
  • 12.8k
14 votes
1 answer
2k views

Possible mechanisms for life near absolute 0

The overview: Would any form of complex life be possible near absolute 0? At least for my personal standards, the "life" merely has to be: a self-sustaining, self-replicating machine, with ...
Brownpill's user avatar
  • 149
3 votes
1 answer
128 views

Ancient biosphere around an orange dwarf? [closed]

How far can adaptation of living organisms go on planets orbiting extremely long-lived, but relatively stable stars? Orange dwarf stars can live several times longer than stars like the Sun, but at ...
Frank Thompson 4's user avatar
8 votes
4 answers
203 views

Would a creature that can change its shape and has temporary limbs have a default/resting body shape?

I have some species of aliens that have pseudopodia, less like the temporary protrusions of amoeba but more like the retractable eye stalks of snails. Their body is covered in areas where limbs can ...
user avatar
4 votes
2 answers
905 views

Would tentacle like appendages along limbs aid in daily life activities?

I am working on an alien species which have tentacle like appendages along their limbs, based on the range of appendages used by marine suspension and filter feeders. On land, many of the species have ...
user avatar
11 votes
2 answers
837 views

Synthetic animal with super skin: Looking for Biotic material that's Elastic, hard to cut and puncture with force

Hey first post here!! I have a species of Synth-animal that is designed to upset ecosystems, consume all crops and livestock, and depopulate cities. The animal is around the size of an American black-...
Postal pat's user avatar
3 votes
1 answer
227 views

How do I shield my calcium bio-electromagnet's wiring?

I'm attempting to design a creature whose internal anatomy includes a powerful electromagnet so that it can do things like pulling guns out of people's hands at close range. Like many electromagnets, ...
KEY_ABRADE's user avatar
  • 12.8k
4 votes
2 answers
252 views

Would 25% less gravity produce dramatic differences in animal morphology?

I'm designing a low gravity world, and when taking into account a variety of factors from plate tectonics to escape velocity, I've figured that 75% gravity is about as low as I can go and still ...
Elhammo's user avatar
  • 975
6 votes
3 answers
474 views

How can a creature have an efficient bird like respiratory system without hollow bones?

Upright; no tail. This is a creature that requires a more efficient respiratory system for longer intense physical activity. But it needs strong bones like mammals have. Bird air sacs extend into the ...
Chickenpeep's user avatar
  • 2,493
3 votes
4 answers
579 views

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 ...
KEY_ABRADE's user avatar
  • 12.8k
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 ...
Logan R. Kearsley's user avatar
3 votes
3 answers
122 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....
Wyvern123's user avatar
  • 1,086
2 votes
3 answers
211 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 ...
sydw1's user avatar
  • 59
2 votes
2 answers
789 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 ...
KEY_ABRADE's user avatar
  • 12.8k
2 votes
1 answer
76 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 ...
Alan Davies's user avatar
8 votes
4 answers
938 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 ...
Choroflorocarbon's user avatar
12 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 ...
Blue Skin and Glowing Red Eyes's user avatar
5 votes
7 answers
416 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 ...
Brinstar77's user avatar
  • 1,487
-1 votes
1 answer
201 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 ...
Chickenpeep's user avatar
  • 2,493
6 votes
3 answers
176 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, ...
user3653831's user avatar

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