Top 10 Scary Underwater Mysteries

Most of the bottom of the ocean has never been seen before by human eyes. What kinds of mysteries lie there in the murky depths? Let's find out.

One of the most mysterious places on Earth is the ocean. I’m sure you’ve heard the old quote that “we know more about the surface of the moon than the bottom of the ocean”. That’s just what I’ve heard – and it makes a lot of sense.

Most of the bottom of the ocean has never been seen before by human eyes. What kinds of mysteries lie there in the murky depths? We’re only just beginning to find out – and they’re pretty incredible. This is the “Top 10 Scary Underwater Mysteries”.

Top 10 Scary Underwater Mysteries
Source: Pixabay

10. The Ice Finger of Death

In a footage which was captured by the BBC off the coast of Antarctica, a creepy, twisting column of ice reaches down to the seafloor and then began to spread out – killing every living thing it touches. Its caused by new sea ice forming at the surface of the water that is so salty it begins to sink and freeze – this is called a brinicle. At first, it baffled scientists and scared people who saw the footage – with some people calling it slow lightning and wondering if larger versions could form that could threaten humans. For now though, scientists are continuing to unpick this fascinating mystery and study the ice fingers of death.

09. Millennium Falcon

Well, at the start of this article you probably would have thought what does the “Millennium Falcon” has to do with scary underwater mysteries right?In June 2011, a scan of the ocean floor near Sweden and Finland revealed something very strange. It looked – and there is no other way to say this – like the Millennium Falcon spaceship from Star Wars. It was found at the bottom of the Baltic Sea and scientists were absolutely baffled. In the absence of any real answer, people just started coming up with their own theories which ranged from a simple rock formation to a crashed UFO. Eventually, a team from OceanX went down to investigate. At first they thought it was just a stone cliff but as they approached it, they realised it was more in the shape of a giant mushroom – with rounded sides and rugged edges. It had an egg shaped hole at the top as well as strange circle formations that looked like small fireplaces – they were even covered in something that looked like soot. The team concluded that it must be a natural formation, but they don’t understand how it was formed – especially because no volcanic activity has ever been reported in the Baltic Sea.

08. The Underwater Pyramid

A few years ago, a huge anomaly was found off the west coast of Mexico. To many people – it looked like a pyramid – but deep underwater. Of course, this caused an explosion online among UFO enthusiasts who believed it to be an ancient relic of an alien civilization. It was first spotted by UFO enthusiast Marcelo Igazusta who was using Google Earth to search for signs of global UFO activity. To this day, you can still use the coordinates to see the feature on Google Earth. Its thought to be 11 miles across which would make it 10 times the size of the Great Pyramid of Cholula – the largest known pyramid structure to date. The area is a hotbed of volcanic activity and so the feature may very well be a product of that – but that hasn’t stopped the UFO enthusiasts searching for more answers.

07. The Underwater Rivers

In Mexicos Yucatan Peninsula lies a very interesting phenomenon – underwater rivers. But how does it happen? Well, when a limestone bedrock collapses, it sinks and forms a pit. This creates a reservoir that fills up with a mixture of fresh and groundwater and saltwater. Finally, when organic matter ends up in there and decomposes, it produces hydrogen sulphide which separates the freshwater at the top from the saltwater below. All of this understand is quite a recent thing – to the first divers that saw this – it simply looked like an underwater river!

06. The Milky Sea

For centuries, sailors who have been out to the most distant parts of the ocean kept reporting a mysterious phenomenon all over the world – the milk sea – miles and miles of pale, milky, glowing water. When they returned, many people didn’t believe them or thought they were mistaken – but in the modern era, sailors are still reporting it. Finally, in 2005, a group of scientists led by Dr. Steven Miller of the Naval Research Laboratory in Monterey California decided to investigate. They studied reported cases and found that on at least one occasion, there was a bioluminescent bacteria in the water known as Vibrio Harveyi. In order for them to cause the effects that have been described, they would have to congregate in numbers – and that is still very much a mystery.

05. Pavlopetri

This is an ancient Greek city though to be over 5,000 years old. In 1000 BC, an earthquake resulted in the entire city being swallowed up by the sea. The area never re-emerged and so it has been preserved remarkably well. Entire roads, houses, gardens, temples and cemeteries are almost as they were the day they were flooded. In 2009, scientists used sonar mapping techniques developed by the military to make Pavlopetri, the first submerged town to be digitally surveyed in 3d. Now, scientists have a big task ahead of them – to figure out who these people were, what were their lives like, and where did they go when their homes sunk beneath the waves.

04. The Giant Squid

For centuries, sailors told tales of the Kraken – an impossibly big squid like creature that lives at the bottom of the ocean, only surfacing to smash up ships and drag sailors to their watery graves. Although the Kraken has fallen into folklore, a very real creature may have taken its place- the giant squid. It can grow up to 55 feet long and was never even photographed alive until 2004. Scientists know very little about this creature. They don’t know its daily behavior patterns, they don’t know whether it comes to the surface or remains deep all the time, they don’t know how fast it can swim, whether it uses its tentacles to catch prey – they don’t even know what it eats or how long they live! The giant squid may prove to be one of the last mysteries of the ocean, forever lurking below the depths of human knowledge.

03. The Immortal Jellyfish

Some humans search for immortality – once species may already have the answer. The scientific name for this jellyfish is Turritopsis Dhornii – its nickname – it’s the immortal jellyfish. Just like every other living thing, it ages, except when it comes to the point where it should start dying, the immortal jellyfish just says nah – it then reverts back to its sexually immature stage, essentially becoming a child again! Their tentacles retract, their bodies shrink and they sink to the ocean floor to start their cycle all over again. Scientists still aren’t sure about how the jellyfish are able to do this. That’s one reason to study them – another is that if we find out how they are doing this, we could use it to fight old age diseases in humans or maybe even figure out immortality!

02. The Purple Orb

In 2016, The team operating the Exploration Vessel Nautilus came across a strange purple orb on the ocean floor off the coast of California – and it appeared to be alive. The scientists were stumped, they had never seen anything like it before. They joked about it being a spider egg sac or a tiny momma octopus. They even nicknamed it -Blobus Purpilis- and they weren’t the only ones who were interested in it – a crab was there too. The crab was knocking the purple blob around and the team had to basically prize it from its claws to retrieve it. After taking it back to a lab to study it, scientists were puzzled as to what it was. After analyzing it, they believe it to be a variant of a sea slug, a purple orb sea slug.

01. The Bloop

In 1997, the bloop sound was heard deep underwater in the pacific by multiple listening stations that were thousands of miles apart. It was a mystery. What made the bloop sound? Theories started to arise. Many believed that it was made by a massive unknown animal that had been awoken at the bottom of the ocean – but what could make a noise that loud? After studying the noise, NOAA – the research group – had determined that the noise wasn’t made by an animal – but rather a natural event. They believe it was the cracking of an ice shelf breaking up in Antarctica that sent sound waves throughout the pacific.

So, that’s all for now and thanks as always for reading thus far, and be back with another interesting top 10 article.

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