Questions tagged [sea-creatures]
For questions involving creatures in seas/oceans. This tag is useful when paired with a broader creature tag such as "biology," "creature-design," or "xenobiology" in order to provide the most specific information possible.
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Could a mature (and giant) lobster remain in sea water indefinitely without decaying?
My pantheon of storyline gods includes a "titan" of sorts, in the form of a giant lobster. At one point in time, she returns to the coastal ocean and exists in a meditative state on the seafloor for ...
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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 content ...
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Underwater technology? [duplicate]
How would aquatic aliens create technology? ( Think late 90's style, and by that, I mean: Phones, metallurgy, electricity, public transportation (think trains), books (and ink that would not just ...
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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 ...
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How would thermophilic fish survive?
I'm designing alien creatures for illustrations, and I'm just sketching some that might live in areas with a lot of geothermal activity. So basically, animals that live around geysers and hot steam. I ...
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What attributes and how big would a sea creature(s) need to be to tow a ship?
I'm trying to come up with ways as to how a ship could travel places with a very low number of people (like 4 crewmen). One of the ways I like for how to do this is to have large sea creatures ...
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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 ...
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How could the hormones of an octopus affect an adult man? [closed]
Let's say the hormones of a Giant Pacific Octopus, 1-and-a-third years old, enter the bloodstream of an adult male. How would or could that affect him?
user65484
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What is holding the cephalopods back [closed]
We already know that cephalopods (octopi and squids) are kind of smart. They are smart enough to unscrew jars. Bet on football world cups (and even win some of those bets), disguise themselves, and ...
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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 ...
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Anatomically Correct Mesopelagic Aves
This is a submission for the Anatomically Correct Series
Recently I had a vision of a colossal underwater bird-like figure.
I would describe it as follows:
Roughly the wingspan of the length of a ...
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How to identify sapient jellyfish?
There is a sapient jellyfish species resembling the box jellyfish found to be lurking in the ocean today. A team of researchers took a sub and dived into the abyss to look for it. What kind of non-...
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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 ...
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Designing a somewhat realistic "Astomi": Filter-Feeding Humanoids?
I've been thinking of reviving an old Fantasy idea of mine, and I recently came across a description of a group of mythological beings that piqued my interest, and which would actually fill a niche I ...
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Ocean travel in a world with sea monsters [closed]
How would sea travel develop if certain parts of our oceans were filled with monsters?
The setting
It takes place on our lovely Earth. No geography changed at all, and you'll see why I wanted to ...
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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. ...
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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. ...
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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. ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Under what circumstances would a nuclear war render Earth's oceans uninhabitable?
It's a bit more complicated. I'm creating a sci-fi world for a tabletop game. One of my created races is a form of humanoid octupi. My idea is for there to be a nuclear war that forces their species ...
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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 ...
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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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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 bat ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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What are reasons a mer-person might speak English? [closed]
If such a thing would even be possible.
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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 ...
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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 ...
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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 enough ...
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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 ...
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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 ...
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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 ...
user33466
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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 (...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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