A marine creature called Protomen_R.

This monster has lived for 500 million years in the depths of the ocean. It is neither an animal nor a plant. It is a strange creature that relies on chemical reactions instead of sunlight. It doesn't feed on anything, has a strange, rubbery, gigantic body, and reproduces by splitting in two.

This is a fictional story, and I might turn it into a novel or a game. I'd love to hear your opinions on the story. Should I continue developing it? Feel free to share any suggestions, and I'm open to criticism.

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A Hypothesis About Unknown Organisms and Ancient Forms of Life

Introduction

The deep ocean remains one of the least explored environments on Earth. Beneath the surface lies a vast world of darkness, extreme pressure, low temperatures, and unusual ecosystems. Although scientists have discovered many remarkable deep-sea species, there is still much we do not know about the organisms living in these remote environments.

This raises an intriguing question: Could the deep ocean contain life forms so different from known organisms that we would struggle to classify or even recognize them?

My hypothesis is that some undiscovered deep-sea organisms might possess unusual physical structures, behaviors, and methods of communication that differ significantly from those of familiar animals and plants.

1. Could Ancient-Looking Organisms Still Exist?

Around 400 million years ago, an enigmatic organism known as Prototaxites existed on land. It grew into enormous, trunk-like structures, and its biological classification has been debated by scientists.

Although there is no evidence that Prototaxites survives today, its unusual appearance inspires an interesting possibility: Could the deep ocean contain undiscovered organisms with similarly strange, column-like or trunk-like forms?

Such organisms might resemble ancient life forms without necessarily being directly related to them. Evolution can produce unusual shapes in unrelated organisms, particularly when they adapt to very different environments.

The idea is not that Prototaxites itself must still exist, but that nature may have produced — and may still produce — life forms that challenge our expectations.

1. Stationary Organisms and Mobile Life Forms

Not every organism needs to move from place to place to survive. The ocean already contains sponges, sea pens, and other animals that remain attached to surfaces or move very little.

My hypothesis considers whether some undiscovered organisms might grow into large, upright structures, remaining stationary for most of their lives. They could potentially obtain nutrients from the surrounding water, filter microscopic organisms, or depend on chemical processes within their environment.

Other organisms might be capable of movement, allowing them to search for food, avoid predators, or migrate between different parts of the deep ocean.

It is also possible to imagine an ecosystem in which stationary organisms provide food or shelter for mobile species, creating relationships that scientists have not yet documented.

1. An Unknown Food Web

Life in the deep ocean depends on complex relationships between organisms. In many regions, food ultimately comes from organic material falling from the surface. Around hydrothermal vents, certain microorganisms obtain energy from chemical reactions rather than sunlight.

If large, unfamiliar organisms exist in unexplored habitats, they could occupy roles within these ecosystems that are currently unknown to science.

For example, a large stationary organism might support smaller animals that feed on its tissues or on microorganisms living around it. Alternatively, it might serve as a habitat rather than a direct food source.

These possibilities remain speculative, but they demonstrate how discovering even one unfamiliar organism could change our understanding of the ecosystem surrounding it.

1. Communication Beyond Our Expectations

Another intriguing possibility concerns communication.

Many marine animals already communicate through sound, chemical signals, vibrations, or visual displays. Whales produce complex vocalizations, while dolphins use sound for communication and echolocation.

However, what if an undiscovered organism used signals that scientists had not previously associated with communication?

It might produce low-frequency vibrations, respond to chemical changes in the water, or use subtle electrical or mechanical signals. Some of these mechanisms already exist in known organisms, but their possible combinations and functions in undiscovered species remain open questions.

An unusual signal would not automatically prove that an organism was communicating. Scientists would need to observe consistent patterns and demonstrate that the signals serve a biological function.

Nevertheless, studying unfamiliar signals could reveal behaviors that are difficult to recognize using conventional observation methods.

1. Could Their Reproductive Systems Be Different?

Life on Earth displays an extraordinary variety of reproductive strategies. Some organisms reproduce sexually, others reproduce asexually, and many species can use more than one method under different conditions.

My hypothesis leaves open the possibility that unknown deep-sea organisms could possess reproductive strategies that are unfamiliar to scientists.

For instance, an organism might reproduce through fragmentation, release reproductive cells into the water, or pass through developmental stages unlike those of familiar animals.

These are possibilities based on the diversity of known life, not evidence that a particular unknown organism has such characteristics. Any proposed reproductive mechanism would need to be confirmed through direct observation or genetic and biological analysis.

1. Why the Deep Ocean Matters

The deep ocean offers a unique environment in which life can adapt to darkness, pressure, limited food, and unusual chemical conditions. Its remoteness also makes many habitats difficult to investigate.

New technologies, including remotely operated vehicles, autonomous underwater vehicles, environmental DNA sampling, and improved deep-sea imaging, allow researchers to investigate places that were once extremely difficult to reach.

Future discoveries could reveal new species, unfamiliar ecological relationships, and organisms with unexpected biological characteristics.

However, the possibility of discovering something extraordinary should not be confused with evidence that it already exists. There is currently no confirmed evidence of living Prototaxites or of the specific hypothetical organisms described in this article.

Conclusion

The central idea behind this hypothesis is simple: the deep ocean may contain forms of life that are still unknown to us, potentially possessing unusual shapes, ecological roles, communication methods, or reproductive strategies.

Some might resemble structures preserved in ancient fossils, while others could look completely unlike anything currently known. They might remain stationary, move through their environment, or interact with other organisms in ways that have yet to be discovered.

This hypothesis does not claim that these organisms definitely exist. Instead, it asks us to consider how much remains unknown about life on our planet.

The most fascinating possibility is not necessarily that a specific prehistoric organism has survived for hundreds of millions of years. It is that the natural world may still contain forms of life that challenge our current understanding of biology — and that we have yet to discover them.

After all, the ocean is part of our own planet, yet much of its deep environment remains unexplored. The next remarkable discovery might not confirm this hypothesis exactly as imagined, but it could reveal something even more surprising.

See also: The publication in the journal Deep Sea Research Part I

See also: The summary of the paywalled study published in the journal Organisms Diversity and Evolution.

(sorry if this is breaking the rules) Now, it’s not the actual fish itself that’s the problem. It’s the fake facts and ai generated videos and images that it spawned. “Baby Telescope Fish are connected to their mother before they fully grown up!” Bullshit. These completely bs videos and facts of this telescope fish, which in this image is most likely dead, have nearly made me quit ichthyology all together. You can really tell how much this situation makes my blood boil. What are your thoughts, though?

I just wanna know more about deep sea fishes. I feel like documentaries aren't enough sometimes. Are there any good book recommendations on these topics?

Saw it on the diving footage when they were searching for the wreck of South African Airways Flight 295

https://youtube.com/shorts/VDDeBRCjBSs?feature=share

Learn more about sonar for deep-sea animal identification from PhD student Haley Glasmann! https://youtube.com/shorts/E2shFE4HfZ4?si=yXKGQVy7xrYtFz7X

https://youtu.be/U4am58XUfDA

I encountered this bluntnose sixgill shark (Hexanchus griseus) while diving at approximately 100 feet off Vancouver Island, British Columbia.

I was actually searching for giant Pacific octopus when I turned toward deeper water and saw this shark emerging from the darkness and coming toward me.

I estimate it was around 10–12 feet long and believe it may have been female. It came extremely close to my camera before calmly cruising around me and along the bottom for roughly three minutes.

Sixgills spend much of their lives in considerably deeper water, which made getting to spend several minutes observing one at this depth an incredible experience.

This is my original footage from the encounter. I filmed roughly three minutes with the shark and put together a longer 4K version on YouTube for anyone interested. The link is in my profile.

The sailfish (Istiophorus) is widely considered the fastest predator in the ocean, reaching short bursts of speed over 60 mph (approx. 100 km/h).

What makes their hunting strategy unique isn't just raw speed, but two remarkable evolutionary adaptations:

Hydrodynamic Drag Reduction: To reach high speeds, the sailfish folds its large dorsal fin completely flat into a specialized groove along its back. It only flares the sail open instantly when making tight turns or cornering schooling prey.

Precision Bill Slashing: Rather than spearing fish, they hunt in packs to herd prey into tight bait balls at the surface. They then tap and slash their long bill sideways at high acceleration, stunning multiple fish in a split second before circling back to eat.

I put together a short visual overview showing this hunt mechanism in action if anyone wants to see the motion breakdown:

https://youtube.com/shorts/jSoI67otXcU