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Q&A

Posts tagged sea-creatures

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Q&A How large could an aquatic humanoid get?

Vertebrates on land are limited in size by various factors. However, in the water, they can get much larger. How large could an aquatic humanoid creature (like cthulhu) realistically get, and what ...

1 answer  ·  posted 2y ago by Praearcturus‭  ·  last activity 2y ago by Praearcturus‭

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Q&A how big does my creature's organ need to blind or stun predator of all size?

Ok so my creature will look like this They're not big, about 2 feet tall. They're technically amphibians but have the scaly hide of a reptile. They live near the sea. Their life cycle is simila...

4 answers  ·  posted 2y ago by user3556983‭  ·  last activity 2y ago by user3556983‭

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Q&A Anatomically Correct Giant Seahorses

This is a submission for the Anatomically Correct Series Giant seahorses are often portrayed in fiction as being ridden by merfolk or other underwater people. I'm wondering if such a creature ...

2 answers  ·  posted 2y ago by Richard Lindahl‭  ·  last activity 2y ago by Richard Lindahl‭

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Q&A Ningens / Humanoid whale-like creatures

Ningens are an old internet legend/creepypasta. Supposedly living in the polar regions of the globe, these creatures are described as having white-skin, a roughly humanoid structure with clear hea...

2 answers  ·  posted 2y ago by Mr Glass‭  ·  last activity 2y ago by Mr Glass‭

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Q&A How large could sea creatures grow on a terraformed Ganymede?

If we assume a terraformed Ganymede has a global ocean roughly 800km deep, that food is bountiful, and that it has been populated by a variety of life from Earth, how large could these creatures gr...

1 answer  ·  posted 2y ago by Wax‭  ·  last activity 2y ago by Wax‭

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Q&A How could an Earth-like planet develop huge pinkish-purple forests on ocean surfaces?

I'd really like to write a story taking place on an alien world that involves a totally new kingdom of life, and I'd like it to be at least somewhat realistic. The idea I have right now is a whole ...

2 answers  ·  posted 4y ago by Eben Cowley‭  ·  last activity 3y ago by Eben Cowley‭

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Q&A How do donut fish eat?

Imagine a particular species of eel that resembles the shape of a torus or donut. It is capable of generating an alternating electric current in the water as a form of communication between other d...

1 answer  ·  posted 3y ago by user6760‭  ·  last activity 3y ago by user6760‭

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Q&A Could a genetically modified coral polyp be used as a pathogen?

Is this even remotely possible? Source Outline: Coral Polyps (along with their copious Calcium Carbonate excretions) are the individual organisms that make up the super-organism we identify as...

4 answers  ·  posted 5y ago by Hsasaradd Tsinthos‭  ·  last activity 3y ago by Hsasaradd Tsinthos‭

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Q&A 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 a...

17 answers  ·  posted 7y ago by Mike.C.Ford‭  ·  last activity 3y ago by Mike.C.Ford‭

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Q&A Could coral float?

I've been thinking about worlds like Keplar-62e, thought to be covered in deep oceans, and wondering about floating reefs. Could a bio-structure substantially similar to terrestrial coral hold eno...

3 answers  ·  posted 5y ago by Ash‭  ·  last activity 3y ago by Ash‭

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Q&A what the aquatic creature need in order to live or survive in my acid water?

inspire by xenomorph acid blood from alien movies. so the water either rivers, lakes, and oceans in my world or some of the regions is highly acidic because some of the dirt or stone minerals cont...

1 answer  ·  posted 3y ago by Li Jun‭  ·  last activity 3y ago by Li Jun‭

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Q&A Writing system of blind, sea dwelling sentients?

So let's consider a species of blind, sea dwelling, squid-like aliens. They are sentient, intelligent and highly social. As their societies develop and their available knowledge increases they req...

11 answers  ·  posted 6y ago by AngelPray‭  ·  last activity 3y ago by AngelPray‭

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Q&A Creating an Anatomically Correct Lusca

The Lusca (its name meaning 'Octopus Shark') is a cryptid from the Bahamas, supposedly a 6-9 meter (or even 23 meter) long man-eating Octopus that lives within the blue holes, dragging victims down...

1 answer  ·  posted 3y ago by DevourerOfStars‭  ·  last activity 3y ago by DevourerOfStars‭

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Q&A What underwater creature would be well-suited as a pack animal?

Suppose that there was a tribe of nomadic mermaids whose lives were primarily centered around following pods of dolphins to eat. They live in the equivalent of the frigid antarctic seas. As they ...

9 answers  ·  posted 5y ago by cuddlefish‭  ·  last activity 3y ago by cuddlefish‭

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Q&A What effect would living underwater have on a mermaid's skin?

Mermaids are commonly depicted as mammalian, human-like creatures from the waist up and scaly fish-like creatures from the waist down. What properties (color, texture, etc) would their mammal skin...

1 answer  ·  posted 3y ago by JacobPariseau‭  ·  last activity 3y ago by JacobPariseau‭

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Q&A Order of Limb Pair Types for Amphibious Creature (Hexanewt)

I need to add a bit of descriptive detail on a species from a brief description. Essentially add a bit of finer detail to someone else's broad-strokes worldbuilding. An amphibious species' body lay...

2 answers  ·  posted 3y ago by vicky_molokh‭  ·  last activity 3y ago by vicky_molokh‭

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Q&A Is bio-luminescence possible in aquatic mammals?

Could a species of aquatic mammals develop bio-luminescence? What kind of bio-luminescence would it be? What circumstances could lead to it?

1 answer  ·  posted 7y ago by jeln‭  ·  last activity 3y ago by jeln‭

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Q&A A Freshwater Octopus?

One of the oddest of cryptids is an octopus haunting the lakes of Oklahoma, a landlocked state. The reason this is odd is that although freshwater mollusks are common, Cephalopoda (the class consi...

2 answers  ·  posted 6y ago by JohnWDailey‭  ·  last activity 3y ago by JohnWDailey‭

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Q&A Shark vs. Sea Turtle--Who Has the Better Odds of Being Whale-Sized Planktivores?

In a hibernating speculative evolution project called The Speculative Dinosaur Project, the "speccers" feature a species of shark called Jasconius pelaganax, the Gigamouth, which is basically a meg...

2 answers  ·  posted 5y ago by JohnWDailey‭  ·  last activity 3y ago by JohnWDailey‭

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Q&A Plausibility of squid whales

I am considering the possibility of having massive cephalopods evolving on my world and having them fill the niche of whales. I've heard about how whales have evolved to increase in size for the p...

5 answers  ·  posted 3y ago by John Lewis‭  ·  last activity 3y ago by John Lewis‭

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Q&A How do marine dragons evolve flight without any feathers and no hollow bones?

These dragons spend most of their lives in the ocean, however during the mating season they will migrate inland and gather together on a mountain top. Throughout the journey they will cease feeding...

3 answers  ·  posted 4y ago by user6760‭  ·  last activity 4y ago by user6760‭

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Q&A How would you go about seeding oceans of Europa with adapted Earth life?

How do you go about building a working Earth-like ocean ecosystem from scratch in Europa's subsurface ocean? On Earth, abyssopelagic species have evolved to live more than 6km below the surface. A...

2 answers  ·  posted 4y ago by Chairman Yang‭  ·  last activity 4y ago by Chairman Yang‭

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Q&A Brine pool ecosystems

(Question in highlighted text) So, the chances are that you've heard of brine pools, which form when methane erupting from the seabed expose ancient salt deposits - the concentrated salt mixes wit...

3 answers  ·  posted 4y ago by SealBoi‭  ·  last activity 4y ago by SealBoi‭

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Q&A How would giant penguins affect the arctic/Antarctic ecosystem?

So, I was reading about the Colossus Penguin and was wondering how adding them to my world might affect the arctic ecosystem in my world? Obviously, they would need to eat a lot of fish, squid, and...

2 answers  ·  posted 4y ago by yukimoda‭  ·  last activity 4y ago by yukimoda‭

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Q&A Octopus ink contains micro parasites that act as acid

I'm building a story around a newly discovered kind of deep-ocean octopuses whose ink contain "parasites" which act as acid in organisms. These ink parasites can be used as a weapon of mass destru...

3 answers  ·  posted 4y ago by SovereignSun‭  ·  last activity 4y ago by SovereignSun‭

Question sea sea-creatures
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Q&A 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 n...

1 answer  ·  posted 4y ago by SealBoi‭  ·  last activity 4y ago by SealBoi‭

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Q&A 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...

5 answers  ·  posted 4y ago by Amoeba‭  ·  last activity 4y ago by Amoeba‭

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Q&A Living biological boats? (Jasconius)

There's this creature that swims over the surface of water and it's giant, almost the size of a whale and has thick scales as armor over its back. This creature almost never dives underwater so fro...

8 answers  ·  posted 4y ago by Ekaen‭  ·  last activity 4y ago by Ekaen‭

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Q&A Adapting organs, How would they adapt?

Okay so I get that for flexibility I need no bones. My octopeople do live on land so they do have lungs. But they are more amphibious than we are. So here is my proposed life cycle: Pregnant octo...

1 answer  ·  posted 4y ago by Caters‭  ·  last activity 4y ago by Caters‭

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Q&A What aquatic creatures would survive a large-end mass extinction?

I want this world to have two things, typically on the complete opposite end of geological timescales: Land fauna is incredibly "Young" - Pretty much nothing larger than a "large" insect (Some li...

2 answers  ·  posted 4y ago by Andon‭  ·  last activity 4y ago by Andon‭

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Q&A Life in extremely low gravity water

Let's assume the planet has only one half the mass of the moon and is covered by shallow ocean. To eliminate water pressure at extreme depths, assume the ocean is also quite shallow, with a maximum...

2 answers  ·  posted 5y ago by Armok‭  ·  last activity 5y ago by Armok‭

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Q&A Why would an underwater creature remain lodged to its prey?

Enter the [Insert cool and awesome Latin name here] - this species is 3 times the size of a lobster from front to tail, and a powerful hunter. Operating in swarms, they are my worlds equivalent of ...

13 answers  ·  posted 6y ago by Aify‭  ·  last activity 5y ago by Aify‭

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Q&A Could a jellyfish be bio-engineered to convert salt water into fresh water?

For my future world, I've decided that coastal cities need fresh water and there isn't enough of it to go around. I don't know how jellyfish work. Is it feasible or completely impossible for sci...

9 answers  ·  posted 5y ago by user73829‭  ·  last activity 5y ago by user73829‭

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Q&A What would be a plausible evolutionary path for a species of marine primate?

I have been working on the idea of a mammal following an evolutionary path similar to whales, which started as semiaquatic before becoming fully dependent of its underwater enviroment. So how could...

2 answers  ·  posted 5y ago by Larx‭  ·  last activity 5y ago by Larx‭

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Q&A Paleozoic marine creatures are now in contemporary sea. What will happen?

Let's suppose Paleozoic marine creatures (Trilobites, early fish, and many else) has appeared in oceans of 2017. What kind of advantages and disadvantages will they have when they compete with mode...

2 answers  ·  posted 5y ago by Heart_L‭  ·  last activity 5y ago by Heart_L‭

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Q&A Can I have a giant tortoise?

I am aware of the square-cube law, so what conditions do I need for this to work ? The tortoise will be a similar size to the isle of Wight and will walk around in shallow areas in the ocean. What ...

9 answers  ·  posted 6y ago by Mendeleev‭  ·  last activity 6y ago by Mendeleev‭

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Q&A Underwater communication on land and beyond

So I'm thinking about an underwater civilization and everything related to it, and I got to thinking about how they would communicate over extremely long distance. I knew that underwater species l...

3 answers  ·  posted 6y ago by Juliette Evans‭  ·  last activity 6y ago by Juliette Evans‭

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Q&A Radiotrophic Deep Sea Life?

Had a random thought. I was wondering if a uranium deposits underwater could result in radiotrophic plants or bacteria to sustain an ecosystem. One issue with this, is radiation has very short att...

3 answers  ·  posted 6y ago by J. Doe‭  ·  last activity 6y ago by J. Doe‭

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Q&A Possibility of bipedal mostly-aquatic species?

I'm trying to design a species that is largely aquatic and yet capable of walking / running (loosely) on land. I've already figured out a gill and lung type respiratory system to allow them to brea...

1 answer  ·  posted 6y ago by Anaïs‭  ·  last activity 6y ago by Anaïs‭

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Q&A Anatomically Correct Murlocs

So Murlocs. I'm referencing Murlocs from World of Warcraft since I never actually found any other novels or games that have them. Described as a bipedal, amphibious, intelligent, aggressive[Still ...

1 answer  ·  posted 6y ago by Skye‭  ·  last activity 6y ago by Skye‭

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Q&A A Reef Without the Coral

An improvement of this: A Completely Different Kind of Reef Which I couldn't delete because it already had answers, and deleting an answered question will dock me some reputation. Today's reefs ...

1 answer  ·  posted 7y ago by JohnWDailey‭  ·  last activity 6y ago by JohnWDailey‭

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Q&A Could a planet different to ours support this species?

(I have tried to fix this question as best as possible with the help provided from the staff of the site.) I have started to develop my own crustacean species that resembles ants slightly. I would...

2 answers  ·  posted 7y ago by krei0n‭  ·  last activity 7y ago by krei0n‭

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Q&A Effect of an enormous waterfall on regional climate and ecosystem

My premise is that a bay-like body of water empties into a sea via a waterfall. Specifications: The sea is roughly the size and shape of the Mediterranean. The tributary body of water is around 2...

2 answers  ·  posted 7y ago by Era‭  ·  last activity 7y ago by Era‭

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Q&A What modifications are needed for my sea creature to able to hold its breath for weeks?

Sperm whales can go 90 minutes at a time without needing to surface. I am interested in an idea for a creature that is air-breathing, but spends a lot of time at depths of (100m to 300m) and some...

5 answers  ·  posted 7y ago by Mikey‭  ·  last activity 7y ago by Mikey‭