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10 Amazing Mariana Trench Creatures (with Videos)

The depth of the ocean holds a lot of mystery in it. Not all parts of the ocean in the world are accessible. Again, some places are accessible, but they contain many mysterious and weird facts that can startle you.

Mariana Trench is one of those mysterious places, which is home to an array of strange fish.

It harbors plenty of mysteries, which are not yet appropriately explored. Located in the Pacific Ocean, this trench is so deep that it can even cover the entire Everest mountain range.

From strange bio-metallic sounds to crazy weather and temperature fluctuations, this trench is home to plenty of fish species and plants.

About Mariana Trench

Oceans are meant to have thousands of unfolded mysteries. But compared to other seas, Mariana is very deep, and it has a lot to offer you.

Mariana is situated in the western Pacific Ocean near Japan, far deeper from the surface area. But what makes it so different from other oceans? Well, it is the deepest part of the world, located in the heart of an ocean.

Whether it is the ecology of the Mariana Trench or the fish, everything is unique and triggers curiosity in one’s mind to explore more about the place.

The length of the Mariana may not be a big matter. But what matters is its depth. This 1580-mile crescent-shaped area in the crust of the Earth is nearly 36070 feet deep.

Whether it is sea plants or fish species, everything dwells deeper in the region, making them unique in appearance and nature. Due to such enormous depths, the trench is not yet widely explored.

Thus, Mariana is still a mystery for all of us, which holds many facts about its plants and fish, which needs to be explored for better understanding.

Why is Mariana Trench so different from other Oceans?

There are several strange facts and truths about Mariana Trench, which sets it apart from any other part of the world.

Exploring all the facts one by one can give you a distinct idea about why Mariana Trench fish species and plants are so unique by nature.

Let’s unfurl all the strange facts about Mariana Trench.

More profound than the Mount Everest

It sounds weird but true! Everest is the highest mountain in the world, which is a challenging pinnacle of adventure that all mountaineers want to achieve. The height of this mountain is insane and becomes more challenging with its extreme weather conditions.

But do you know what is more strange? If you submerge Mount Everest in the Mariana, the mountain’s peak will immerse more than miles under the water. Doesn’t it sound spine-chilling?

Thus, Mariana animals and plants lie far away from the sunlight, which allows them to grow pretty differently.

Probably one of the oldest oceans

Mariana fish species and plants that dwell deep in the bottom of the water are probably having their existence dating back millions of years.

Do you know what is the most interesting fact? Mariana Trench is almost 180 million years old. So, you can anticipate the unique way of survival and evolution of Mariana Trench fish.

What would be more exciting to know is how these fish maintain their way of breeding. Well, it is still a matter to explore and study deep!

House of plenty of living beings

The world is undoubtedly strange, and so is nature. The most exotic and strange fact about life is that it tends to find its way and grow even if there are thousands of obstacles. And Mariana Trench is not an exception.

Many living organisms are found in the Mariana, even though there is a lack of suitable living conditions and prevalent hostile and acidic water parameters. A myriad of fish and plants are found here.

More than 200 known microorganisms and plenty of small creatures, including various weird Mariana Trench fish species. Bizarre species like amphipods and crustaceans are also found here.

Apart from Mariana Trench fish, another new snailfish species is found that comes with unique characteristics, along with an out-of-the-box look.

With aquatic animals like telescope octopus, snailfish, etc., this part of the world is a house to plenty of other organisms.

Variety of range of depths

The Mariana Trench comes in a variety of depths in it. Some of the places are deeper than others. The deepest of sections is called the Challenger Deep.

The deepest area’s very name is named after two ships that managed to do an expedition to explore Mariana Trench’s depths with their sounding equipment. The ships were named the HMS Challenger and HMS Challenger II.

It’s worth imagining and wondering how lives like Mariana Trench fish, snailfish, telescope octopus, and other predatory sea creatures, along with several plants, evolve and survive in this deepest ocean of the world.

Various ranges of temperatures

The Mariana temperature comes in a variety of ranges from the surface area to the deeper levels. The temperature here is sometimes cold and sometimes hot.

You might think that the Mariana Trench environment might be tremendously cold since sunlight cannot reach here. Well, it’s true to some extent as the temperature ranges between 34-39 ℉.

Also, do you know what is more surprising about Mariana Trench? You can also get hot water here. But how is that even possible? Well, the trench comes with hydrothermal vents all over. The water that flows out of those vents can even reach up to a temperature of 700 ℉.

So, wonder how strange it is for Mariana Trench fish and other creatures to live here. But mysteriously, they do survive in such an environment!

As fish and plant species accustom their living to the varied temperature ranges, it helps them evolve innovative features as sea animals and predators, living far away from the coast near the bottom.

Nevertheless, the Mariana Trench waters release lots of minerals, which supply sustenance for aquatic creatures living down there. And this serves as a favorite subject for every scientist and research team.

A mysterious sound comes out

Apart from the strange lives like Mariana Trench fish and other living creatures, there is more to know about this deepest region in the Pacific Ocean. It is a mysterious metallic sound!

Don’t be afraid! It’s not any sea monster that can scare you off, but it is the strangest bio-metallic sound of the Mariana Trench that keeps making this place worth exploring.

This sound emanating from the trench is quite a strange and loud “twang” noise of the “western Pacific Biotwang,” and it was first discovered in 2014.

According to scientists, there might be some minke whales, which can emit Star Wars-like sound effects. However, just like any other Mariana Trench fish, these Minke whales are also one of the most strange beings.

Strange undersea volcanoes

The Mariana is not free from danger. Not only giant sharks or weird-looking fish species can scare you to their best, but also there are other hazards in the underwater environment.

Well, we are talking about volcanoes. Yes, you heard that right! There are plenty of massive muddy volcanoes and rings of fire underneath the waters of the Mariana Trench. These volcanoes spew hotter mud and fragments of rocks from the depths of the Earth.

It is the place where Pacific tectonic plates get pushed downwards with Philippine Sea plates, making it a hotspot for all strange volcanic activities.

Deepest of the trench is polluted

The underworld of the ocean floor is not free from the horrors and terrors of the Mariana Trench fish, snailfish, and other sea creatures. But the most terrific beast in the world is humans themselves.

According to a report, divers in 2019 discovered some candy wrappers and plastic bags in the Mariana Trench foot.

Isn’t it scary? Just think, about where we have taken the level of pollution in the natural environment! Finding polythene bags 35849 ft. under the sea is a matter of significant concern for mother nature. People have already polluted a place, which is yet to be adequately explored.

As per a group of experts in 2017, it is estimated that several Mariana Trench areas are more contaminated than the polluted rivers of China. It means that we are unknowingly pushing the Mariana Trench fish and plant species’ life towards bigger threats. Saddening, but true!

Mariana Trench Creatures

Unlike other famous ocean creatures like fish, sharks, whales, octopuses, seahorses, etc., Mariana Trench has something strange to offer you. The creatures, including the Mariana Trench fish that you find here, are too weird in looks and behavior.

It is evident for anyone to have a glance at the strange-looking fish species or other creatures of this ocean and mistake it as a creature straight out of some different planet.

Here are a few bizarre fish species, which have been discovered in the depths of the trench so far.

Dumbo Octopus

Though we aren’t sure whether they are dumb or not, undoubtedly, they look like a dumbo! The Dumbo Octopus, apart from other Mariana Trench fish species, looks unique with its lethal nature.

Their flappy ears with eight tiny tentacles and deeply set eyes make them have a name after the famous character of Dumbo Octopus by Disney. They are usually found at 9800 meters of depths under the sea.

With its 8-12 inches size, this creature comes with the strange behavior of flapping its ears. However, their dumb look does not mean that they are not at all dangerous. They are predatory enough to devour their prey in one gulp.

Comb Jellies

Unlike other popular jellyfish, comb jellies are unique in appearance and traits. Their luminous body looks illuminating.

With their comb-like plates, they tend to move in a unique way, which is the reason behind their bizarre name.

This underwater Mariana Trench fish species are much more predatory by nature. Even sometimes, they tend to attack their own selves. Some of them are pretty tiny, while others tend to grow up to 5 ft. in length.

Deep Sea Hatchetfish

Another very unique Mariana fish is the Deep Sea Hatchetfish which comes with a fairly small structure. They are pretty distinctive with their way of producing light from their stomach.

With a length of about 2.8-12 cm, these fish are easy enough to become the prey of other larger sea creatures.

However, they tend to have a unique camouflaging mechanism, which works as their best strategy to stay safe from other voracious underwater predators of the Mariana Trench.

Barreleye Fish

Barreleye fish is one of the peculiar Mariana Fish species, which looks like a clear plastic bag. These fish have a transparent head and membrane, which protects them from the stings of other prey fish.

This fish usually comes with flat fins, which help them stay still and move with utmost precision in the ocean’s dark areas.

Seadevil Angler fish

Seadevil anglerfish is distinctive with its terrifying appearance. Their sharp teeth and gaping mouth with bright eyes make them look very scary.

This fish’s luminous antenna muscles that protrude from their head make them easily differentiable from other Mariana Trench species. The light emanated from these antennas helps them attract prey to their close vicinity so that these seadevil fish can easily catch them.

Their breeding is also unique as the male fish fuse into female Mariana fish species and lives on her resources until the specimens can produce sperms.

Mariana Snailfish

Mariana snailfish is another fish, famous for dwelling in a deep bottom range of 8000 meters. The ghostly-looking snail fish are much more dangerous by nature, according to researchers.

Pseudoliparis swirei or Mariana snailfish is relatively easy to find in the hadal depths of the Mariana. Mariana snailfish usually look like tadpoles that reach up to a length of about 28.8 cm with 160 g weight.

Though from the look it might not be evident about their nature, pseudoliparis swirei is among the top predatory animals of the Mariana Trench.

Ping Pong Tree Sponge

Apart from the Mariana fish species, there are many other sea creatures that you can find here. Well, the ping-pong tree sponge is a unique specimen that comes with its own unique traits.

This tree-like creature looks like a plant, producing ping-pongs. These ping-pong tree creatures are dotted with tiny hook-like extensions. Any prey that comes in contact with the animal will get trapped in it. Then this sponge will very smartly gulp the prey alive. Doesn’t that sound too strange and scary?


As we know, most jellyfish are transparent in look. However, the scenario is different when it comes to the Mariana Trench fish species. Benthocodon is much of an opaque sea creature.

They look undoubtedly unique with their red-colored cover named the bell, which is used for illuminating Benthocodon’s prey. It comes with approximately 1500 tentacles, helping them to cruise throughout the ocean.

Frilled Shark

The frilled shark is one of the most popular Mariana Trench fish species that are usually considered living fossils. With their eel-like body structure and dark brown-colored appearance, they are very easy to spot. This fish looks scarier with its 5-7 frilled gills, which is the very reason for its name.

Like other predators of the Mariana Trench, this one is also hazardous as it can devour whole prey with its flexible jaws and lead a healthy life. Their 300s of recurved and needle-like teeth make them more dreadful.

Nevertheless, this shark dwells 5000 meters underneath the water and is one of the first deep-sea creatures to be found.

Minke Whale

Another prevalent predator of the Mariana Trench is the Minke whale. As already said, these fish are the main reason behind the quirky sound that comes out of Mariana Trench. They are usually the second smallest baleen whale and are distinctive with their pygmy-like structure.

A mystery lies in these whales’ auditory systems, which is still a question mark for researchers. They are deadly predators and show no mercy to their prey; thus, making the underwater world more dreadful.

Wrapping Up

Well, whatever we know about Mariana Trench is very little compared to the share of mystery it holds. There are many facts yet to explore, which keeps scientists stuck to it to unravel more information.

Whether it is a strange fish or a completely new weird-looking sea creature, there is a lot to know. This place is a mix of dark, cold, and crushing water pressure, along with weird-looking groups of fish and other aquatic organisms.

Mariana Trench fish species are not yet so popular for aquariums as one has to go through wholesome research to mimic the exact water condition of the Mariana Trench to care for those weird-looking creatures.

But some of the species like amphipods or crustaceans are popular as fish foods. Mariana Trench offers you crazy exotic Mariana snailfish, making it a crazy place for a great expedition.

However, it’s all about waiting eagerly to know what more mystery Mariana Trench has in its pocket to reveal for us.