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Questions tagged [underwater]

For questions about events occurring below the surface of a body of water.

2
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2answers
161 views

Can my mermaids work?

Looking to how I can make Nagas and Mermaids able to exist and evolve in my story, I came across this post which explains how Nagas could evolve from humans: Anatomically Correct Naga In the top ...
3
votes
1answer
127 views

Underwater Farming

In my colonizing business, some colonists build a underwater base on a all-about nice planet. They are using food storage right now; but now they need to start farming. Ive looked up some farming ...
0
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3answers
133 views

Giant Terraforming [closed]

In my story, a planet colonizing business goes to a very unlikely part of space to have a good planet in the goldilocks zone. When they out of pure luck, scan a planet almost exactly like earth. They ...
4
votes
2answers
177 views

What Sea Creatures Would Make Good Undersea Cavalry?

In my book series, there is an underwater civilization called the Lobster Empire (basically underwater Rome inhabited by Crab and Lobster people). Stuff to know about the Lobster Empire: Roman-esque ...
1
vote
2answers
95 views

How would a colossal explosion affect an ocean-based planet?

In my book series, a space station called the T-Ray that is capable of causing explosions the size of the Chixculub impact explosion just fired at a planet that is completely covered by a massive ...
1
vote
1answer
74 views

Submerging to avoid storm damage [duplicate]

The land is full, there are no roads, and cars can fly. Some spend their whole lives in a single square mile. Life isn't entirely miserable for the average person, but trust me. You wouldn't choose ...
7
votes
8answers
343 views

High tech underwater weapon

Assume soldiers of the future need to fight person to person underwater, at depths from 30 to unachievable today, like 1-2 kilometer. Today, underwater warfare between scuba divers, involves ...
9
votes
4answers
2k views

In a single-continent world, what could cause hydrothermal vents?

In the world I'm building, there is a single continent. However, in the deeper parts of the ocean, there are hydrothermal vents. They're pretty necessary to my story, but I can't figure out why they ...
5
votes
3answers
188 views

How large does a human’s plastron need to be?

I’m referring to an entomological plastron which is a structure that traps a bubble of air next to the insect's body but permits contact between the air and the water. As the insect consumes oxygen ...
5
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5answers
193 views

The practicality and feasibility of a fully-submersible aircraft carrier

There's this organisation with an underwater naval base on Île Pott masquerading as a third rate hotel resort. Said base features several underwater hangars housing a considerable fleet comprised of ...
3
votes
2answers
93 views

What phonemes are most recognizable underwater?

In my fantasy world, there has been a longstanding presence of underwater civilizations, both alongside and independent of surface-based kingdoms. In the style of Tolkien's Beleriand, various ...
0
votes
1answer
135 views

How can a planet have an atmosphere in a universe full of water? [closed]

Imagine a universe where the space is not empty (or almost empty) but somehow it's full of water or other liquid. How could planets still have an inhabitable atmosphere? What could make this "air ...
8
votes
3answers
292 views

Could mermaids feasibly make clothing out of natural rubber?

In a world I'm currently developing, I'm working on a merpeople equivalent (more or less physically identical to your bogstandard mermaids, for the purposes of this question), and I want them to wear ...
23
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12answers
9k views

Could a person scuba diving take off his air tank and use it to propel himself?

So, in my story, in a prelude to an epic aquatic fight scene, my main character gets chased by a great white shark. He swims as fast as he can but he can’t escape. Just to clarify, he’s wearing one of ...
15
votes
4answers
2k views

Could you actually make Sandy's Treedome in real life?

So, I have a question that focuses on a character from a show, Spongebob. Sandy Cheeks lives in a reverse aquarium under the sea in Bikini Bottom, in a dome that looks like this The Treedome is made ...
10
votes
5answers
617 views

Would the collapse of civilization make turning into a vampire and colonizing the ocean floor a sane idea?

One idea I've always wanted to try writing is the concept of vampires exploiting their lack of a need to breathe and generally low-maintenance biology to escape the brunt of the sun's rays by living ...
1
vote
4answers
176 views

Getting through the ice, to the ocean of Europa [closed]

Trying to figure out the practicalities of drilling through the ice on Europa's surface, to drop a sub into the water beneath. From what I understand the three most viable methods would be Wait for ...
1
vote
1answer
61 views

Foundation For An Underwater Dome [closed]

Can I get help on how to make a foundation for an underwater dome that can hold an amount of 150,000 people? But don't try to use Wikipedia, please.
29
votes
15answers
5k views

Are there any structural materials suitable for production underwater?

One of the points made in a number of recent questions regarding underwater races has prompted me to review one of my older pieces of world-building. Namely: the difficulty of producing common ...
4
votes
0answers
131 views

What is a realistic look for a humanoid race that can live in deep-water and land? [closed]

So I have an original species that I'm creating called the Larimar. I have a picture of them below, which I drew. I'm still working on the backstory for these folks, and I don't want to give away too ...
-1
votes
1answer
55 views

What to have in a future colony [closed]

can I get help on finding out what the price of many items would be in a colony in the future or in 3000? I also need to know what kind of ways we could use a colony underwater. Someone please help ...
4
votes
6answers
318 views

Weapon that can destroy an underwater city?

Two intergalactic superpowers, the Western Republic and the Eastern Empire, are in a Cold War. The Eastern Empire is comprised of mostly aquatic species, while the Western Republic is mostly ...
4
votes
5answers
309 views

Forging metal under water, using thermite

I have a world setting that contains a variety of underwater species, some crustacean, some cephalopodic, and other varieties. Different species are adapted to different depths, and a few are ...
6
votes
2answers
291 views

What would the “tanks” of an underwater race look like?

Note: Some answers will refer to not just tanks, as previously I asked about military vehicles in general, then edited it because it was too broad. So, right now I'm working on a project centred ...
6
votes
3answers
160 views

Deep Sea Habitat on a Low Gravity Planet

I read somewhere that the lowest depth for a sustainable underwater habitat is estimated to be three-hundred meters. Any lower and the pressure becomes too great for structures that are currently ...
2
votes
1answer
132 views

How would an aquatic, air-breathing species develop the technology to create a spaceship? [closed]

This question is about attaining the technology required to build a spaceship. The asserted duplicate question assumes that technology already exists. In order to build a spaceship, you need to: ...
7
votes
6answers
266 views

How would an aquatic, air-breathing species organise its spaceship interior?

It's easy to imagine how would a water-breathing aquatic race outfit its spaceship - take a normal spaceship, insulate it, fill it with oxygenated water, possibly add some enhanced turbines to pump ...
1
vote
3answers
217 views

If a species of dolphins were developed with a few tentacles, what type of society would they build? [closed]

One of the most special things about humans compared to other animals is our industriousness. We have intelligence and we are able to make use of it. I was wondering if Dolphins, widely considered to ...
15
votes
9answers
3k views

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 ...
6
votes
3answers
289 views

Could modern sharks adapt to live in deep water?

After circumstances make the shallow water in the oceans uninhabitable, great white sharks retreat to the deeper parts of the ocean, about 600 feet down (182 meters) to survive. The sharks can not go ...
2
votes
2answers
274 views

How long could a city last if it were completely underwater?

Let's say there is a city, about the size of New York City, that is made only out of stone, steel, and glass. This city would be completely underwater. Assuming no humans are alive in this city, how ...
3
votes
4answers
329 views

What weapon would be used by a civilization living 10 000m underwater?

I am creating a population of human fish that has created a city in an oceanic trench. There are few things to know about this kind of people and the place where they live: they are a bit stronger ...
5
votes
5answers
1k views

Where on Earth is best to build a large underwater lab complex?

Let's say I'm an extremely rich and somewhat secretive research group who wants to carry out experiments and such away from the prying eyes of the public. One of the obvious ideas for the location of ...
3
votes
1answer
126 views

Could an aquatic mammal develop an eel-like fin as opposed to a fluked structure?

Anatomically speaking, could an aquatic mammal develop a horizontal fin that instead of being localized at the end of the tail extends up the sides in a similar manner to how an eel's fin extends up ...
1
vote
5answers
165 views

How can a sunken city, Atlantis disappear from the sonar?

It is still a myth as far as our modern civilization is concerned, Atlantis located somewhere within the devil's triangle and it's inhabitants had struck down many planes and vessels daring to disturb ...
4
votes
2answers
404 views

Could Air-Breathing Mermaids Colonize Atlantis?

I rediscovered this article recently and loved all the creative answers on how a mermaid might build underwater. This, for me, brought to mind Atlantis, the kingdom that sank into the sea. I've ...
4
votes
6answers
2k views

How do 21st century C.E. submersibles enter an underwater dome swiftly and safely?

Imagine there is a micro-city built on the ocean floor in the pacific ocean covered with a durable dome with a 1 mile radius to keep water out. At this moment let us assume that the dome holds up ...
1
vote
8answers
205 views

Sea/Air fighters using current/near future tech?

The Setting I'm doing background work on a story involving a civilization about as advanced as ours materiologically. A significant part of their military operates along the continental shelf zone ...
5
votes
3answers
111 views

Calculating the Resistance of Water, for Purposes of Violence

I'm writing a story about mermaids. For this reason, I'm wondering how much you can hurt someone by say, throwing a punch, hitting them with a rock, or even throwing a spear or rock. I'm not sure how ...
37
votes
17answers
10k views

In an underwater society, would the wheel ever be invented?

In a different question, someone mentioned "technology dichotomy", where they said "you can't invent time travel without first inventing the wheel". Then I read the question In a society of flying ...
21
votes
7answers
5k views

How would nuclear fallout affect the oceans?

I'm trying to build a setting in which humankind would have no other choice than to live underwater to survive. Suppose there was a nuclear war in which a huge part of the human population died, and ...
9
votes
5answers
512 views

How to manage water in a city 2500 feet below sea level?

In my Pathfinder RPG campaign setting I have two continents separated by an isthmus. An artificial canyon carved through the isthmus from one ocean to another divides the continents. The canyon is ...
10
votes
5answers
2k views

What would merfolk economies look like?

This is a world with underwater merfolks and other humanoids. They have opposable thumbs, so they can use tools humans can use. Lets assume there's different subspecies and races of these merfolks, so ...
21
votes
17answers
7k views

What is a medieval technology method of underwater enemy detection?

I am writing a DnD module where fishmen are invading island nations. The islands would naturally have adapted to this in some way as the raids have been happening for years. What method would these ...
10
votes
1answer
224 views

Engaging your warp drive while underwater

There have been more than a few questions covering Alcubiere warp drives, many about what happens with one at FTL and a few about using them at sub-light speeds. I'm curious about what happens at ...
3
votes
2answers
222 views

Reliable Source of Heat for Underwater Society? [duplicate]

This society consists of various peoples and fantasy races, but most of them have heat requirements similar to humans. What would a reliable source of heat for this society be? Bonus points if this ...
11
votes
5answers
3k views

Underwater acoustic muffling/dampening and sonar evasion. Is a stealth torpedo possible?

So I have various factions with submarines and surface ships battling it out for control over various underwater resources. One of the rarer and more lethal weapons is a "stealth torpedo". It presents ...
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vote
0answers
124 views

How would a huge sexual dimorphism and a short male lifetime of sapient celaphopods affect their society? [closed]

Related to the question: How could a climate-protection organization breed sapient, tool-developing cooperating Cephalopoda? After breeding several lines of the Larger Pacific Striped Octopus (...
6
votes
2answers
338 views

Can underwater Atlanteans make explosives without coming onto dry land?

Is it possible for under water Atlanteans to make explosives? These Atlanteans have no magic but do have gills. They look like normal people other than the gills and webbed hands and feet. They ...
13
votes
4answers
397 views

How could a climate-protection organization breed sapient, tool-developing cooperating Cephalopoda?

I am working on a scenario where a climate protection organization tries to breed sapient Cephalopoda as a help in their fight against climate change. The breeding goals of the evolving species are as ...