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Questions tagged [sea]

For questions specifically about a sea, which means an area of water within an ocean.

67
votes
17answers
11k views

How could a natural road form across a sea?

BACKGROUND I'd like my earth-like world to have a naturally formed narrow strip of land that bridges a major sea. Now, before anyone rushes off to comment about island chains and land bridges, I'll ...
38
votes
12answers
70k views

Using international waters to avoid legal punishment

I am playing with the idea of a lateral thinking puzzle based around abusing international waters to make an action 'legal'. For the sake of this question lets assume someone from the US is looking ...
33
votes
22answers
6k views

What could cause humanity to migrate from land to water?

I'm constructing a world where the humanity had to migrate from land to water somewhere in antiquity. In this world, humans are living on seas and rivers. They live both on pier-like and other fixed ...
27
votes
7answers
8k views

What if the ocean's salt level decreased by 50%?

What would happen to the fish/animals living in the ocean, if the water became 50% less salty, within the space of three months? Would everything die, or would they evolve very quickly? Related: What ...
25
votes
4answers
6k views

If the Black Sea was disconnected from the Mediterranean, how long would it take to become freshwater?

The Black Sea is a brackish body of water, that used to be separate from the Mediterranean. Further back, it was likely part of the Mediterranean before the last ice age. How long would it, or for a ...
25
votes
7answers
8k views

How much would it cost to recreate Doggerland as it existed before 16,000 BC?

To expand the territory of the EU, one can consider recreating Doggerland by reclaiming the lost land from the sea: Had our ancestors had more technology, they could have dealt with the sea level ...
23
votes
4answers
7k views

What if the seas had fresh water in them?

In a future world, where there is almost no fresh water resources left, a radical scientist comes up with an idea to turn all the oceans into fresh water. The general idea is to be able to ...
21
votes
4answers
930 views

Is this coral lagoon geologically possible?

BACKGOUND I’m working on a region for my world, and I have a very distinct idea of what I want the physical landscape to look like. Below is a description of what I'd like for the land, and an ...
15
votes
2answers
529 views

Would a Roman civilization be willing and capable of building large scale sea defences against a serious but unrealised flood threat?

Scenario The straits of Gibraltar never quite opened and the entire Mediterranean basin is dry land apart from a few large salt water lakes at the lowest points ~5% by area. The Europe – Africa land ...
15
votes
1answer
877 views

Creating a realistic world - Thermohaline circulation

One crucial aspect of the climates have been left out so far, deep water circulation. It's the major force driving the heat transfer form the equator to the poles and its flow can influences local ...
14
votes
2answers
1k views

Natural pearl factory

Related to my other question. What would be best conditions for a natural super colony of pearl oysters and the best conditions for them to produce pearls naturally. Shallow or deep waters? Slowly ...
13
votes
4answers
976 views

Shallow sea world - plausable geology?

Imagine a world covered in a shallow sea (usually only 4 metres or less) that has little land, where there is land its in the form of fairly small islands (less than 1sq KM) This will be populated ...
11
votes
2answers
956 views

What would happen at the core of a water world?

If there existed a planet that was made completely of liquid water, no solid matter at all, what would the core of such a planet be like? Let's assume that this planet has conditions similar to earth, ...
8
votes
3answers
393 views

How do the tides work when the sun powers the moon to keep out evil?

So I wanted to give the players a reason to eventually go to the moon. But this is a fantasy setting, so having the moon just be a big rock floating in space would just be so.... blasé. So I came up ...
7
votes
3answers
867 views

Corrosive oceans and seas - how would this affect our world?

Okay, I will make a little premise/context to give the question a decent background. I know that the scenario could look rather "handwavy", but take it as the framework on which the answer should be ...
7
votes
1answer
350 views

Can I have a beach of pearls?

Far south-west of the main continent exists an island in a shape of crescent moon with dense jungles and slender mountain peaks and a single city named Kalt stands in a place where the islands' ...
6
votes
5answers
2k views

HELP! Stuck on a small island with only rum [closed]

Ok, so I'm stuck on a small pacific island due to bad sailing skills. I've lost everything I had except my laptop and internet connection. Now, my mouth requests water, but movies told me not to drink ...
6
votes
2answers
190 views

Shapeshifting an individual's physiology for environment (Space Whale)

So let's say you have a typical Space Whale: 27 km from stem to stern, an ecosystem for many creatures in and of itself. I feel that I don't need to explain this part... just picture an average space ...
6
votes
4answers
582 views

Sea Travel Variables

Basically, I am looking for variables in travel for the same ocean or sea journey, along the coast, but in the opposite direction. No motors, just standard 15th century ships. I am building a world ...
5
votes
4answers
2k views

Replace sea salt with sugar, what happens? [closed]

A malefic wizard has announced to the world that tomorrow he will turn all diluted sea salt into sugar. What will the environmental effects be?
5
votes
3answers
183 views

Any stealthy methods of tracking vessels at sea before advent of RADAR?

Clearly, I don't mean simply keeping eyes on a target ship -- unless of course there was some method by which one ship could remain within visual range of another without being seen by the target. I ...
5
votes
2answers
267 views

How big of a tidal wave could 2 binary planets create

So I'm working on a story based on a binary system involving two Earth sized, Earth like worlds with very eccentric orbits. In the story, one of the major coastal cities is protected by a massive ...
5
votes
3answers
392 views

What would be the consequences of humanity migrating from land to water?

I'm constructing a world where the humanity had to migrate from land to water somewhere in antiquity. In this world, humans are living on seas and rivers. They live both on pier-like and other fixed ...
5
votes
1answer
214 views

Bay evaporated by a volcano

In the world I am designing, I want to have a bay with a tight bottleneck, filled with salt water from the ocean. You can think of the bay as river shaped. To avoid creating a "C" shaped island I want ...
5
votes
1answer
180 views

What would a receding seabed provide for human civilization?

In my world, the Straits of Gibraltar have been closed during a post-apocalyptic glacial period and the Mediterranean is isolated from the oceans. The result is similar to the Messinian salinity ...
4
votes
5answers
218 views

How to have a tribe measure the tides while living under the sea?

I'm dealing with a primitive tribe (of a species that can breathe underwater) that lives deep under the sea, and has little in the way of human technology. Resources include things naturally found in ...
4
votes
2answers
280 views

Make humans digest salt water?

As followup to this question: What would it need to make land animals (and humans) able to digest salt water? That would be very helpful for everyone travelling across the oceans. There are millions ...
4
votes
2answers
248 views

How would a world with an extremely high water level and only a small land mass differ from Earth?

Consider a planet identical to Earth except having such high sea levels that most continents never surface, and the only available land is a "small" continent very geographically similar to Australia. ...
4
votes
2answers
74 views

Growing seaweeds on lakes and seas in tundra-like biome

Ok so I was thinking about a Viking-like civilization living in a tundra biome. So, other than raiding villages southwards or hunting wild beasts in the forest, could they cultivate seaweed for ...
4
votes
1answer
409 views

What are the effects of building an artificial land bridge connecting Britain to Europe?

I was wondering what would happen if lots of dirt and rocks were dumped into the English Channel to create a link between England and Europe?
4
votes
1answer
392 views

What would happen to the ocean when lowering atmospheric density?

Suppose one fine day a mischievous god decided to eradicate all air molecules on Earth in an instant, my question is what will hapen to the ocean? Please kindly disregard (omit) your concern for life ...
4
votes
2answers
378 views

What 17th century technology can the people use to hunt a sea monster?

During the 17th century CE, there are many accounts of a giant sea monster living in the sea and the king ordered a search party to destroy it. The sea monster usually shy away from people and feeds ...
3
votes
4answers
2k views

Could nuclear fallout melt the ice caps and cause an accelerated sea level rise?

I'm writing a story where a total nuclear WWIII occurs in the early 21st century. in a matter of minutes all of the world's nuclear powers unleashed their entire arsenals on each other in an event ...
3
votes
4answers
344 views

What could totally submerge a city without causing too much damage?

What occurrence could completely submerge a city- let's say Los Angeles- relatively quickly without actually causing a great deal of damage to it in the initial process? (A little like Atlantis. But ...
3
votes
2answers
279 views

How much land disappearing would it take to drop the sea level by 10 meters (30ft)?

THINK ATLANTIS There's an island. Maybe it is a continent, maybe not. I am not sure and that is why I need your help. If the size of my world is equal to Earth's, what landmass size would it take ...
3
votes
3answers
585 views

If we connect a ship directly to a person, would the person be the master of the vessel? [closed]

Let's say we have a ship with all systems integrated into a electronic network, and we have a human integrated into this electronic network wirelessly through implants to act as a sort of management ...
3
votes
2answers
88 views

What would the climate/environments be like on a planet covered in small crater lakes and seas? [closed]

Imagine an Earth-like planet with no major oceans, all the water has collected into circular craters from impacts that are no longer occurring. Let's say the planet is covered evenly with 50% water ...
2
votes
1answer
231 views

The Tethys Salinity Crisis

From 5.96 to 5.33 million years ago, disaster struck the Mediterranean Sea. A tectonic snag turned this... ...into something like this. In this alternate scenario, the sea separating modern Europe ...
1
vote
3answers
227 views

Would we solve oceans rising problem by destoying the Moon?

Sea levels are rising due to global warming. The Moon brings tides that also rise the sea level. If we destroyed the moon could this problem be solved? Would it have other consequences?
1
vote
3answers
230 views

Cordoning Corrosive Ocean

Imagine the entire ocean becomes extremely corrosive due to ocean acidification over a couple of decades, all nations have agreed to erect a permanent barrier along all shorelines to seperate land and ...
1
vote
2answers
70 views

Animals migrating north from Africa after meteor hit Earth - era of 'ice' [closed]

To eleborate on my question asked here - Light Emitting Animals - What happens to the food chain? where every animal has evolved / produced a light emitting organ. Scenario - 200years after my first ...
1
vote
2answers
115 views

The Tethys Renewed: Where Cold Meets Warm?

The Cape of Good Hope in South Africa is the point where the warm, moisture-carrying Agulhas Current from the Indian Ocean collides with the cold, nutrient-carrying Benguela Current from the Atlantic. ...
1
vote
1answer
207 views

How does a herbivorous mermaid species without gills and swim bladder stay underwater its entire life?

Fish breathe through their gills by extracting dissolved oxygen from the surrounding water and most bony fish species have evolved swim bladder to help them maneuver the sea effortlessly. How do the ...
1
vote
1answer
186 views

What would be the consequence of higher oxygen level in water

Related to this question on the topic of merfolk. What would be the consequence of higher oxygen level in water? As far as I know it is at 14 to 15 mL per liter with a water temperature at 0°C. (...
1
vote
1answer
187 views

What would a sea made of Iodine look like? [closed]

If it was possible, what would a sea made of liquid state Iodine look like? How would it smell? From my research, I've seen people saying its liquid state is somewhat "invisible" since it generates a ...
1
vote
3answers
97 views

Repercussions of floating nuclear power station going into meltdown?

Set in an alternate 2010s/2020s, floating nuclear power station are now common as they can provide power to any city it is docked at (think along the lines of this real world example. or this ...
1
vote
2answers
232 views

Edestus Gigantus In modern oceans

What are the effects of introducing 2600 sharks of the primitive Edestus Gigantus specie* in modern waters in different places on earth? Will they survive, how ? for how long? can they destroy the ...
1
vote
2answers
133 views

Can a river or a sea made of gas exist ? A sea of clouds to sail it

The question is: can a solid float on gas? The answer is yes, as is explained pretty well here But i was wondering if physical conditions (low gravity, very dense gas, pressure...) can exist where a ...
1
vote
0answers
172 views

The Neo-Tethys Sea, in Full [closed]

In Turning the Mediterranean into a sort of Neotethys, I focused only on tilting Africa to the extent that Gibraltar has become an isthmus connecting Africa to Europe, thus opening passage to the ...
0
votes
2answers
143 views

What armor for my giant slug species to do battle at sea?

Set in the medieval period around 1400AD, the atlantean set flipper on the land of the giant slug and destroyed many acres of crops, this provocative action angered the giant slugs. These giant slugs ...