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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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What happens when a dryad tree awakens? [closed]

A dryad is a fey-like creature bound to a tree. Always female and mostly human-shaped with some tree-like features, her life-force is bound to her tree - should the tree die then so does the dryad and ...
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3answers
197 views

Creature Design: Wind world ectotherm

Premise By definition, an ectotherm uses environmental heat sources to regulate its own body temperature. The most common forms of body heat regulation that we observe from ectotherms here on Earth ...
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4answers
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Anatomically Correct Carnivorous Blankets

There is a website called the SCP Foundation which features a variety of creatures, objects and phenomena that border on the horrifying to the just plain weird. This one straddles the boundary between ...
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2answers
235 views

Designing venom glands for an elephant: misting

Laugh all you like, you won't be laughing when it sprays you with its jade trunk of death. Info I figured out that I wanted an elephant that sprays poison (not acid) out of its trunk a while ago (...
7
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1answer
247 views

Is a Muscular Net feasible?

I have a clam that has modified its foot to make a flat, net-like structure to catch insects often shaped like a leaf. I wanted to know where this hit in terms of feasibility or if there were any ...
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5answers
349 views

What evolutionary pressures would lead to giants?

Somewhat similar questions have been posed before, but what I'm really interested in is what selection pressures would be necessary to produce a subspecies of giant humans, about three meters in ...
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1answer
127 views

How would an organism create energy if it had access to no heat and little sunlight? [closed]

This is a continuation on from my earlier question on whether or not an alien species would be able to exist with liquid nitrogen as a main component of its blood. Liquid nitrogen is EXTREMELY cold ...
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8answers
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Designing a creature with jaws to crush iron bones

In my most recent question, I asked for a material other than calcium and collagen that could form skeletons in alien creatures. My favourite answer was bio-steel; "Iron with a small percentage of ...
4
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2answers
102 views

Skin of Large, Terrestrial Amphibians

I have some large, megafauna level amphibians inhabiting a temperate rainforest with naturally high levels of humidity. Would my large amphibians have any problems maintaining a classic amphibian type ...
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10answers
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Liquid nitrogen blood?

Would it be possible for an alien species to have liquid nitrogen for its blood? What would be required for that to work? What kind of environment would it need to exist in?
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3answers
199 views

Nostrils? why not feathery tentacles?

Simple question I think, I have some Idea of the answer but would like the ol' second opinion. Vertebrates use olfactory glands in their nostrils (or thereabouts) to sense smell, as well as the roof ...
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2answers
285 views

Is an organism that is a collection of worms inhabiting a bare skeleton possible?

The skeleton hoard (How would this creature keep its skeleton "host" in one piece?) outlined in this post is actually a sentient worm colony ruled by a "Queen" affectionally called a head ...
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4answers
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How would this creature keep its skeleton “host” in one piece?

In my fantasy world, which lacks a name currently, there is a race of what looks like a series of interconnected worms or maggots that is known for growing in and around skeletons using its own body ...
6
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1answer
140 views

Metal-Feathered Macaw Viability Part 2: Best Wing Shape?

More posts from this thread are here: Metal-Feathered Macaw Viability Part 1: How Can It Fly? Info See this previous question to learn about the premise. We now know, via this amazing answer, ...
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5answers
3k views

Anatomically Correct Siren?

I am interested in creating a reality based version of a creature from Greek mythology called a Siren. Sirens were believed to combine women and birds in various ways. In early Greek art, Sirens ...
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4answers
171 views

Creature Design Challenge- Extreme Gravity Flying Vertebrate

If you were tasking with creating a genetically engineered flying creature, capable of full powered flight on a (newly terraformed) planet with a surface gravity almost twice that of Earth's, do you ...
13
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2answers
350 views

How plausible would a fully aquatic bat be?

So, it turns out that bats are actually pretty good swimmers; several species of bats have been reported swimming, and they're far more capable and agile in the water than they are on land: https://...
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10answers
862 views

Fixed-Wing Birds?

How plausible are naturally-evolved, biological, fixed-wing flying creatures? Could such a creature plausibly evolve in Earth-like conditions? If so, what method would it be most likely to use for ...
12
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3answers
521 views

How could an acid-cow make a barrier against acidic milk by synthesizing PTFE, and what would it line?

Info I'm designing a breed of cow that produces acid instead of milk. Part of the reason this is useful for my story is that the cows produce as much acid as a dairy cow would milk (through ...
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4answers
287 views

Creating a scientifically semi-valid super-soldier, part 8: Communication

Previous parts here: Creating a scientifically semi-valid super-soldier, part 1: Skeleton Creating a scientifically semi-valid super-soldier, part 2: nervous system Creating a scientifically semi-...
2
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1answer
61 views

Mitocondrial Density in an arthropleura on steroids

Context In one of my stories I am having a villain try to bring back the beauty of the giant arthropods in the Carboniferous period by genetically engineering his own personal, mega-pseudo-arthropods....
6
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4answers
252 views

Would my lizardmen be good at throwing things?

Okay, so I was creating a cold-blooded humanoid species (for a story, I'm no scientist) and ran into a problem with some of my logic. Because of their obvious issues with overheating, these ...
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2answers
97 views

Biological adaptations necessary for weaponized (or otherwise made useful) reflux

I have been thinking about which mutants from Marvel are most realistic and Zeitgeist comes to mind. Long story short, his power is weaponized acidic vomit. He can spew it a few meters away at will. ...
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2answers
247 views

Anatomically Correct Inklings

I’m writing a Splatoon fanfic, and I was hoping to make it a bit more science-based than the minuscule information we’re provided in-game. The two primary features of Inklings are their ability to ...
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3answers
223 views

How do I change the color of my alien's feces?

I apologise in advance for the graphic nature of this question. I guess it just had to be asked. I am looking for a way to make the feces of my alien vertebrates some color other than brown or green....
2
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1answer
226 views

Anatomically Correct Vodník

A submission for the Anatomically Correct Series. The Vodník (or Vodyanoy) are very interesting water spirits from Slavic mythology.They're described to have long green hair, and a face like a frog. ...
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2answers
152 views

Could Organic systems ever power circuits?

I have a race of mainly insectoid aliens known as the Erepo who have virtually bioengineered a ecosystem around themselves. Now I currently have them using either organic systems they can "grow" or ...
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6answers
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Metal-Feathered Macaw Viability Part 1: How Can It Fly?

More posts from this thread will be linked here: Metal-Feathered Macaw Viability Part 2: Best Wing Shape? Info I'm designing a macaw that has metal feathers, claws, and a metal beak--to be ...
6
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6answers
251 views

Is intelligent life possible at temperatures as low as -190°C?

I am creating a planet where life exists on big islands of frozen methane around the poles. I did some research: from what I understand, methane freezes around -180°C, so I wanted it to be -190°C (...
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3answers
336 views

Designing an Earth-like alien that can survive the harsh conditions of this desert planet [closed]

The planet or orbits a G type star like the Sun that’s 20 percent brighter than the Sun, it orbits once every 130 days at 0.5 AU with an eccentricity of 0.08, and rotates once every 335 earth-days. ...
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9answers
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Biologically sound reason why underground dwelling Drow have dark skin? [duplicate]

The Drow from Dungeons and Dragons are a race of elves with dark skin and pale hair that live mainly underground. How could these elves develop such a coloration when they live underground, away from ...
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2answers
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What would be the physiological/anatomical adaptations of a 50 metre sea serpent?

In my last question, How large could my sea serpents be?, I asked what length would be a) possible and b) necessary for a whale-eating sea serpent. My sea serpent is a constricting predator* in a ...
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1answer
160 views

Body design for 10 Senses [closed]

A creature has 10 senses other than sight,smell,taste,touch,hearing* subject to addition very soon
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4answers
198 views

Proud warrior race with terrible depth perception. How do they look?

I was working on a science fiction story with a variety of alien species. Most of them seemed entertaining and plausible enough, but I got stuck on one particular species that I could use some help on....
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1answer
256 views

How large could my sea serpents be?

EDIT: (Important) M. A. Golding commented that the regalecid method of locomotion would be unfit for a constricting predator, so I have completely redone the taxonomy of the sea serpent. They are now ...
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2answers
135 views

A World Surrounded by a Powerful Energy Layer [closed]

In my story the world is surrounded by a powerful energy layer. The life in that world is dependent on that energy, just like we are dependent on oxygen. Is such a world possible? The energy would be ...
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5answers
575 views

Anatomically correct Dungeons and Dragons Mimic?

This one’s a bit of a stretch, so bear with me. The classic monster in table top games and video games alike: a monster that can imitate the shape of things (mostly treasure chests) to lure in people ...
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What kind of animals are my trolls?

Edit: I've written an answer of my own now, and I'd appreciate it if any of you informed on the subject of evolution could review it, then inform me of its plausibility, via the comments (Of the ...
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3answers
267 views

How can I explain the evolution of my giants?

Note: this is not a duplicate of Anatomically correct Giants or What would be the tallest possible height for humanlike creatures in earthlike conditions? because my giants are far from humanoid. ...
8
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2answers
322 views

Are my wing-walking griffins viable?

This is the third question in a series of such for my worldbuilding project that deals with plausible fantasy creatures. Previously, I have pondered cockatrices and hydras, but now we move on to ...
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3answers
286 views

Hydras as parasitic-mating, polyandrous amphibians?

This is the second question in a series about my ongoing worldbuilding project, which seeks to explain the evolution and biology of various fantasy creatures. The first one was: Is petrifying vision ...
11
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1answer
263 views

Best material for windsilk

I'm developing a silkworm that spins webs of a particular kind of "silk" and weaves thin, fragile webs. The magic part of this is that it also spins wind. The following addresses how this works and my ...
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4answers
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How could a human be corrupted into a demon?

In many stories, the transformation of human to demon has been interesting to think about. This of course extends to mythology: In multiple folklore, it's said that Lilith became a demon of her own ...
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6answers
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Sonar Jamming Squids

Context In the arms race of survival many animals have developed ways of evading predators, but the animal I am interested in for this question would be the tiger moth. So basically these guys jam ...
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3answers
151 views

Would a wheeled creature be a plausible development of evolution? [duplicate]

So, as I understand it, wheels are almost completely absent in nature, in terms of a method of mobility. Would it be possible, or reasonable for such a creature to be made along the lines of evolution?...
2
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2answers
238 views

Avian-human: Arms or Wings

I've seen bird-human hybrids before in popular fiction, where they have legs, wings, AND arms. So I was wondering if this was really plausible. Humans don't want to give up the ability to manipulate ...
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7answers
2k views

How to justify rare item drops from monsters from a video game perspective? [closed]

I'll give a little background for those who don't play video games. In most role-playing video games, you kill monsters for a lot of reasons. Oftentimes, these monsters yield "drops" ranging from ...
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6answers
563 views

Is petrifying vision plausible in an animal?

Note: this question is not a duplicate. The accepted answer to the question "Anatomically correct Medusa" explains the petrifying vision via calcifying toxins spat from the snake hair. This a) wouldn'...
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5answers
595 views

How viable is a creature that floats through the air like a living hot air balloon

My idea for a creature within my fantasy story is that of a creature which floats through the air like a living hot air balloon. It would do this through the intake, storage and regulation of gases ...
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2answers
137 views

How could can humans evolve to have reptilian attributes?

In my world, all of my demihumans have evolved from the same ancestor from modern humans. This conceptually includes my version of Reptilians/Lizardfolk. For the most part I would have them share the ...