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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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Body plan of a 4D human-analog?

I am attempting to design aliens that live in a universe with a 4+1 space-time--i.e., a universe with four orthogonal spatial dimensions, rather than three, in addition to a fifth time dimension. In ...
7
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2answers
381 views

What element would make up a creature if it used the weak nuclear force during its metabolic processes?

I was doing some research on how to design a scientifically possible alien, when I came across an interesting section on metabolism. I found it very interesting and read about the weak force, as ...
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2answers
237 views

Which hydrogen halide to have in blood to replace water?

So I want to have an alien creature on a planet with a halogen atmosphere. It will have to be at a temperature where the hydrogen halide is liquid or solid. This hydrogen halide I would have as the ...
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4answers
158 views

How big could a land-dwelling arthropod get if it wasn’t limited by oxygen consumption?

Insects and other land-based Arthropoda are stuck at the size they are due to how inefficient their respiratory system is. They were able to reach the size they did in the Carboniferous period because ...
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8answers
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What could be the physiological mechanism for a biological Geiger counter?

Some humans have been genetically engineered to be able to detect ionizing radiation to better survive the harsh environments found outside of earth's protective magnetosphere. What could be the ...
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2answers
109 views

What animals would be most suited to a tidally-locked world? [closed]

Are there any species that would be able to sustain themselves on the sunlit face of the planet, the habitable Terminator-zone or even the freezing icy side of the planet? How would animals adapt to ...
2
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2answers
214 views

Anatomically Correct Ego Sword

I'm reading a comic set in a really unique fantasy game. One of the creatures that really caught my attention were a type of slime/sword called ego sword. In their normal form they're a blob but can ...
5
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6answers
261 views

How can I prevent the creation of fruit-salad chimeras?

A Chimera is a creature made up of two different animals that are fused together in a process known as polymerization. This spell can combine animals to create an entirely new animal which contains ...
145
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7answers
14k views

Anatomically Correct Strange Women In Ponds Distributing Swords

Chaos plagues the land. In the West, the King in Orange blusters and bloviates endlessly in barely comprehensible gibberish. Perhaps he is attempting to call forth the Elder Gods? In the East, the ...
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19answers
18k views

Would a 'World Tree' be feasible in real life?

A livescience.com article claims that trees can reach a theoretical height of 400 to 426 feet (122 to 130m). This is due to the tree being unable to carry water up to the top at that certain point due ...
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6answers
822 views

What would prevent chimeras from reproducing with each other?

There exists a polymerization spell that allows distinct animals to combine with each other, creating an entirely new creature. The beasts in question are held in transumutation circles linked by ley ...
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3answers
269 views

How to produce milk that's similar to blood?

How could a mammal produce milk which resembles blood? The blood milk should keep as many properties of milk as possible, curding for example, while resembling blood as much as possible. The mammal ...
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1answer
150 views

Traversal of creatures in space (hydrogen metabolistic processes)

For a space-based story I am writing, I was hypothesising about how to have organisms that can thrive the vacuum of space. Ignoring plausibility of such a creature evolving, I realised a few problems ...
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2answers
496 views

Anatomically Correct Swarm of Rodents

Rats are commonly associated with illness and disease due to the role they played in The Black Death. However, some works of fiction portray rats as carnivorous swarms, devouring people ...
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7answers
4k views

If a person had control of every single cell of their body, would they be able to transform into another creature?

If a person had control over each and every single cell in his body, I.e: Cell growth Cell multiplication Shape and form of cells How cells bond/bind with each other Cell Function Would they be able ...
5
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1answer
145 views

No iron for your fair-folk maiden? (Part 4: Silver)

Part 1 No Iron for your fair-folk maiden? (Part 1) Part 2 No iron for your fair-folk maiden? (Part 2) Part 3 No iron for your fair-folk maiden? (Part 3) Only two parts left to go! Now my fair folk ...
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2answers
128 views

No iron for your fair-folk maiden? (Part 3: Iron)

Part 1 can be found here No Iron for your fair-folk maiden? (Part 1) And part 2 can be found here No iron for your fair-folk maiden? (Part 2) So, my not so metal inclined Fair-folk are encountering ...
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1answer
83 views

No iron for your fair-folk maiden? (Part 2: Radioactive metals)

For reference, here is part 1 No Iron for your fair-folk maiden? (Part 1) A brief recap. My fair-folk are weak to all metals, but each metal has their own specific effects. The last question resulted ...
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3answers
446 views

No Iron for your fair-folk maiden? (Part 1: alkaline)

Excuse the broad question but I couldn’t resist making a metal pun. So in my universe the Fair Folk encompass a large group of creatures. They live in their own little pocket universe, in which ...
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3answers
105 views

How can a soul sucker avoid the negative traits of its victims?

People are souls that inhabit and animate human bodies. The lifeforce of an individual is what powers the soul and allows it to excercise control over the body. Physical and mental attributes, such as ...
6
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6answers
361 views

Beak to teeth reverse evolution - how would the transitional forms be?

Acording to current scientific knowledge, birds descend from theropod dinosaurs. This evolution had, as usual, some transitional forms, like Archaeopteryx. Following this evolutionary path, we notice ...
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17answers
10k views

An underwater creature that could take down a boat

Imagine that when Christopher Columbus sailed West in his Carrack to travel around the world to reach India, he had never made it to land, because halfway across the Atlantic Ocean between Europe and ...
5
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2answers
140 views

Seasonal Shade-Plant

There is a forest in my world with a special property: All the trees are optimised to shade as much as possible during summer and give as little shadow as possible during winter, to regulate the ...
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0answers
33 views

Making a scientifically accurate fire-breathing dragon [duplicate]

I came up with a concept for how a dragon could breathe fire. However, I haven’t figured out some crucial details, which I need help with. The dragon would capture the methane gas produced by its ...
5
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2answers
400 views

Anatomically correct Guivre

The Guivre is an amphibious dragon from French mythology: Many of its aspects are typical of Western dragons, but there are two which distinguish it from others: Its breath causes disease It cannot ...
10
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1answer
144 views

Using sound to swim through sand

Subarenaceous animals are those which can move long distances through dry sand - like sandfish lizards, or Dune's sandworms. The main problem they have to tackle is turning the sand immediately around ...
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2answers
129 views

Let's make a thunder creature!

Let's create a creature with the ability to create a loud boom with only its body. We'll start with a terrestrial predator, that gives us a good reason as to why it needs to do this. It uses the ...
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6answers
355 views

Why would a bird have split wings?

On my world there is a creature that has a 'split' in the plumage of its wings and tail. Instead of having a singular D-shaped surface (when viewed from above, the bird facing to the left), it is ...
3
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2answers
169 views

Would advanced Plantoids be plausible? [closed]

Could it be plausible that if enough time given and favorable conditions are met, the dominant species of an alien planet could be a species of plant and by dominant I mean achieving sentience and ...
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4answers
309 views

How could a 10m tall giant swim across a freshwater lake?

Suppose we scale up a human to about 10m in height and their skeletal structure have evolved to ensure they won't succumb under their own weight. Due to their unique blood circulatory system they can ...
35
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10answers
5k views

Anatomically Correct Carnivorous Tree

How might a carnivorous tree look or work? The following conditions must be met: Consumes members of the biological kingdom 'Animalia' Possesses something resembling a trunk or stem of any kind ...
6
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2answers
188 views

Brain Micromanagement

Imagine a creature much like ourselves that can control the usage of their own mind. For example, a dying ancestor may tell some parting words which are so important that the individual explicitly ...
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3answers
197 views

How could a marilith evolve?

Mariliths are these D&D creatures that are basically nagas except with six arms. OK, technically this image is from Final Fantasy, but you get the point. What environmental factors could cause ...
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2answers
212 views

Anatomically Correct Pinocchio

Pinocchios are known to be mischievous creatures, but why did they evolve that way and how do they survive? The creature has the following properties: Appears to be made of wood Not taller than a ...
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3answers
772 views

Anatomically Correct Demons

Demons have been a staple of multiple religions for thousands of years, just like angels. While some of the points brought up in the Anatomically Correct Angels post (and other posts on flying ...
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4answers
238 views

What sort of qualities might a tortoise-like animal the size of an argentinosaurus need to support its own body?

I am wondering what kind of physical qualities (E.g. Short, thick pillar-like legs) a creature such as this would need to support such an incredible size. The world that it evolves on in almost ...
11
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2answers
296 views

Speculative Biology of a Haplodiploid Humanoid Species

In haplodiploid sex-determination system, female/diploid individuals are developed from fertilized eggs by means of sexual reproduction, while male/haploid individuals are developed from unfertilized ...
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2answers
68 views

How would a race develop specific adaptations in an area with hard, rocky soil and sturdy trees? [closed]

In my world, one of the races is from a part of a continent with dense, rocky soil and large, hardwood trees. Their whole culture is structured around establishing sturdy foundations and permanence ...
2
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2answers
121 views

Could bio-luminescent plants survive in total darkness for ~3 months annually?

If a three-month dark period was a normal, recurring, part of a 15-month calendar, and plants had evolved to be bio-luminescent, could they survive? Would only some survive and, if so, would it be ...
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3answers
116 views

Advantages of being covered in taste buds? [closed]

On my conworld, I am developing a creature that is covered externally in taste buds. What would be the evolutionary advantages and disadvantages of having this adaptation?
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5answers
551 views

What would an animal that absorbs nutrients though its skin be called? [closed]

Animals that eat meat are carnivores, animals that eat plants are herbivores, animals that will eat anything are called omnivores. But what are animals that absorb 25% of their nutrition directly from ...
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4answers
2k views

If quadruped mammals evolve to become bipedal will their breast or nipple change position?

As the title says, you know stuff like minotaur, lycanth or werewolf, cat or dog folk, etc especially for the female specimens. I want to know what happen if quadrupedal mammals which usually have ...
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4answers
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How to convincingly explain Kaiju

This will be a companion question for How plausible is my monster?. My previous question dealt with a story treatment for a hard science and realistic take on Kaiju/ giant monsters. While that story ...
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4answers
139 views

What sort of hip bone is required for quadrupedal animals to locomote on their hind legs?

I am designing a creature that is quadrupedal but can run after prey on its hind legs. What kind of hip bone would allow for the excess stress to be put on it during bipedal locomotion? The animal is ...
3
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4answers
193 views

How can I make these feet spikes more sturdy?

The bone is three inches circumference at the joint and one-millimeter circumference at the tip. How might this bone support the front of an animal weighing one-hundred pounds? It runs with its legs ...
22
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7answers
6k views

What can I do to make blood black?

In my world I find it simplest to have iron-based blood. The problem is that iron-based blood is red, and I want it to be black. Two things come to mind; one is making the blood denser, resulting in ...
3
votes
1answer
89 views

Are there certain qualities needed for an animal to be tamed?

Are there certain qualities that animals need to be tamed? Let's say, for example, a quadrupedal omnivore with intelligence on par with Earth's ravens. It does exhibit opportunistic predatorial ...
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2answers
2k views

Feasibility of giant flatworm people

There are lots of examples in fiction of lizard people, bird people or beast people, but I'd like to expand my phylogenetic horizons in conceptualizing my world. To that end, I have conceptualized a ...
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3answers
2k views

Why do Ichisongas hate elephants and hippos?

In the mythology of the Lambas people of Zambia, there is a creature called the Ichisonga. It is a herbivore, and very rhinoceros-like in appearance. Upon hearing a hippopotamus, it allegedly sneaks ...
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3answers
194 views

Switching between poikilothermic and homeothermic metabolism

I am designing a mammal living in a warm environment (like a warm desert) which has developed a switchable metabolism, so that during the day it is cold blooded and during the night (when it is colder)...