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Questions tagged [sea-creatures]

For questions involving creatures in seas/oceans.

8
votes
2answers
118 views

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. ...
13
votes
4answers
4k views

How long could a Kraken's carcass survive if preserved in salt?

I have a bay of water containing several Krakens. One day, due to the efforts of a magical organization, all of the water disappears. The Kraken fall and die on the bed of salt that is left behind. ...
-3
votes
3answers
143 views

Creature that can sleep/hibernate under the water for a very long time [closed]

There's a god that can morph into any creature he wants. He wanted to sleep for a very long time (like centuries), and found a perfect place at the bottom of a lake that is connected to the open sea. ...
4
votes
3answers
159 views

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 with ...
32
votes
18answers
5k views

How would a ship defend against a sea creature, and possibly win?

I have a Viking-inspired race living on a harsh ocean based planet with very rough and cold seas. In these seas there are giant creatures, not unlike kraken who frequently attack ships. I was thinking ...
6
votes
5answers
845 views

Could a Mosasaurus destroy a ship?

Would a fictional relative of a Mosasaurus, the fictional one being a tad bit bigger, be capable of destroying a ship? For the purposes of this question, assume a wooden ship of comparable size and ...
6
votes
2answers
124 views

Explosive jellyfish

Could a creature like this exist? Jellyfish or cephalopod-like creatures that live in 'swarms' underwater. They float aimlessly around in a net formation. When one member detects prey below the ...
2
votes
2answers
97 views

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 ...
12
votes
1answer
244 views

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 ...
0
votes
3answers
124 views

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 ...
10
votes
1answer
229 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 ...
20
votes
6answers
1k views

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 ...
28
votes
8answers
3k views

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 from ...
6
votes
1answer
196 views

Water-walking animal

What are the requirements for mass distribution and body positioning that would enable a large creature (say, a panther) to walk on water (and still be able to dive down and swim if it wanted?) This ...
1
vote
1answer
120 views

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 ...
3
votes
4answers
276 views

Humanoid based on Octopus: Flexibility and organ protection

I am planning on making a new species based on octopus and humans. Human in skeletal structure, Octopus flexibility. I am thinking of calling them octopeople. As far as flexibility, I am thinking of ...
2
votes
2answers
153 views

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 ...
8
votes
2answers
729 views

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 ...
0
votes
3answers
211 views

How would a sea-dwelling species wage a war with humanoids (and possibly win)? [closed]

There are two dominant species on the planet Someplace. One is humanoid, much like us. They have modern-day technology, and have similar physical traits. There are around 1 million people in the ...
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 ...
-2
votes
3answers
107 views

What are reasons a mer-person might speak English? [closed]

If such a thing would even be possible.
18
votes
9answers
7k views

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 ...
-1
votes
4answers
228 views

Is this species scientifically plausible? [closed]

Homeworld Zyns have evolved on ocean moon of Ctalul, the single major moon of gas giant Darstan which orbits the orange dwarf Verrstbirt. Ctalul was once an icy planet with an unstable orbit until ...
1
vote
2answers
171 views

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 a ...
1
vote
2answers
197 views

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 modern ...
1
vote
0answers
121 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 (...
5
votes
3answers
204 views

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 ...
15
votes
11answers
746 views

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 ...
5
votes
9answers
515 views

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 ...
4
votes
3answers
202 views

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 like ...
4
votes
3answers
201 views

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 ...
10
votes
4answers
3k views

Would the existence of Megalodon during the medieval ages threaten Sea Travel and how to defend against them? [duplicate]

The Megalodon was an 59 feet (18 meter) long shark said to have roamed the entirety of Earth's ocean. Of course, it's quite extinct. However, what if somehow it managed to survive all the way to the ...
9
votes
1answer
392 views

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 ...
3
votes
1answer
309 views

Would a Giant Pistol Prawn Snap work in the air?

I'm getting a giant unrealistic crab to be capable of reproducing the pistol shrimp's snap with their claws? pincers?. Anyway I want to know whether there is a way to let this be a weapon on land. I ...
12
votes
1answer
357 views

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 breathe ...
6
votes
5answers
317 views

How would a language using colors and lights translate verbally?

How would a species be able to communicate using colors, flashing, and images on their skin (like some deeper water fish) with someone who speaks verbally, like a human? Is a translation devise even ...
28
votes
7answers
7k 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 ...
14
votes
4answers
1k views

How to let a Whale urh… fly? [duplicate]

I have read about flying sharks that hunt birds and great monstrous flying whales, so I would like to know how a whale could conceivably start 'flying' in real life. I'm gonna just set Blue Whales as ...
3
votes
5answers
1k views

Fantasy Water-Dwelling Races [closed]

In the world that I'm building, instead of humans being the primary species I want to make it a species that lives in oceans. While I may use mermaids in the story, I don't want the primary species to ...
49
votes
13answers
7k views

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 the ...
4
votes
5answers
206 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 ...
3
votes
0answers
207 views

Creating a realistic world map - fisheries [closed]

I've sketched out my coastlines, my mountains, my wind currents, and my climate zones. If its Earth-like in all respects but geography, where should the inhabitants of my world expect to find fish, ...
11
votes
6answers
4k views

Would evolution select for mermaids without breasts?

So ignoring all the other hydrodynamic inefficiencies associated with sticking a human torso on a fish body, let's just worry about those most distinct of human female features, breasts. The problem ...
0
votes
1answer
112 views

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 are ...
4
votes
2answers
212 views

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 ...
5
votes
2answers
217 views

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 20 ...
4
votes
5answers
334 views

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 ...
4
votes
2answers
368 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 ...
67
votes
11answers
10k views

Let's weaponize jellyfish

Jellyfish are... weird. They're clear, slimy, and can sting after death. Sounds perfect for experimentation, so lets weaponize them! Consider a hypothetical world where jellyfish are extremely common ...