The Earth is mostly covered by water, a big part of which consists of our oceans. The size of the ocean is roughly 139 million square miles, with an average depth of 12,080 feet. Did you know that we know more than the moon than our planet’s deepest waters? In fact, as of June 2024, we have only mapped about 26.1% of our seafloor. There’s no need to do the math, but there’s a vast chunk of backyard that remains undiscovered and unexplored. There’s a long list of mysteries of the deep ocean that we’re yet to unlock. Here are some underwater mysteries and phenomena that have fascinated us for years.
1. The Underwater Pyramids of Yonaguni
Japan captivates people from all over the world. Undeniably, it is a place where tradition blends with the latest technologies and innovations. The land of captivating contrast is also where you can find one of the most amazing underwater mysteries–the Yonaguni Monument. The rock formation can be found in the shallow waters of Yonaguni Island near Okinawa. Discovered in 1986, the monument is about 328 feet by 197 feet and about 82 feet. While they look artificial, they are traced back thousands of years ago when humans could not possibly have the tools to make such precise cuts and angles on solid rocks. Could it be a natural formation? Or part of a lost human or alien civilization?
2. The Devil’s Sea (Dragon’s Triangle)
If you’ve heard of the Bermuda Triangle, there’s a similar spot in the western Pacific Ocean. Known as the Devil’s Sea or the Devil’s Triangle, this region is near Japan’s south coast and extends east of Taiwan and the Philippines. While not as well known, there have also been reports of ships and boats disappearing in the area. Note that many of these are not verified but are often attributed to the strong ocean currents and bad weather systems. Some also blame the incidents to volcanic activities since the area is part of the Ring of Fire, and to magnetic anomalies that cause navigational tools to malfunction.
3. The Sargasso Sea
Another item on the list of mysteries of the deep ocean is the Sargasso Sea. According to experts, it’s the only see on our planet without a land boundary. This means it’s bordered by four ocean currents. The water of the Sargasso Sea in the Atlantic Ocean is exceptionally clear with a deep blue hue. It is also well-known for the big clumps of floating Sargassum seaweed, referred to by many as the golden rainforest of the seas. It’s a region of special interest for scientists who study the area’s ecosystem. There’s a diverse marine life thriving in the calm waters of Sargasso, from coral communities, Sargassum frogs, angler fish, and so much more.
4. Life Underneath The Ross Ice Shelf
You might be hearing from news reports about how climate change will affect the levels of seawater. To do this, scientists monitor vast ice shelves. One of those being monitored by experts is the Ross Ice Shelf in Antarctica. What’s amazing about the biggest chunk of ice on Earth is that there’s hidden life beneath it. Scientists found shrimp-like creatures about 1,640 feet under the Ross Ice Shelf. There’s no clear explanation yet of how they live in such an extreme environment, but they may help us further understand what the conditions are like in places well beyond the boundaries of the planet. Experts plan to do further exploration using more advanced robots to better understand the creatures they found.
5. The Baltic Sea Anomaly
A team of scientists aboard a research vessel made a startling discovery. They found a strange object with unique markings in the depths of the Baltic Sea. What went viral in 2011 was an interpretation of an artist. It was a visualization of the sonar image that somehow can be likened to the shape of Star Wars’ Millenium Falcon. Experts think that the Baltic Sea Anomaly is a natural formation. Meanwhile, there are those who push the idea that it could be an alien ship.
6. The Bloop
The bloop is the low-frequency sound recorded by a team of experts from the National Oceanic and Atmospheric Administration in 1997. The mysterious noise is one of the loudest heard using arrays of equipment. The Bloop also came in unique patterns. There were speculations that it could be from unknown deep sea creatures. While today, experts point at ice quakes as the source of the sound, a lot of people still insist that this explanation is still quite thin.
7. The Mariana Trench
The Mariana Trench is about seven miles deep and is recognized as the deepest point of the planet. In its darkness is a world full of mysteries and possibilities. It’s always dark, it’s always cold, and the water pressure is extremely high at these depths. For these features and truths, the Mariana Trench is one of the most inaccessible parts of the planet. However, experts continue their efforts to study it because the more we know about it, the more we will understand about the climate and how the planet is continually evolving.
8. The Milky Sea Phenomenon
The Milky Sea Phenomenon is like something straight from a well-written fictional book or a Holywood film. It is a captivating event that turns vast areas of ocean waters into a glowing field of faint light. From sailors in the 1800s to scientists during the early 2000s, people have been fascinated by the Milky Sea. Scientists point to huge colonies of bioluminescent bacteria and the perfect condition in the surrounding environment as the cause of the phenomenon. However, they also say that it has not been fully solved. They still try to gather evidence of how they form and why they occur.
9. The Bermuda Triangle
The Bermuda Triangle has been one of the longest-known mysteries of our generation. For decades, there have been reports of planes and vessels disappearing as they reach the location of the infamous spot in the Atlantic Ocean. The points of the infamous triangle are located between Florida, Puerto Rico, and Bermuda, with a total area covering about 1.5 million square miles. The disappearances before were blamed on bad weather, human error, rogue waves, and other out-of-this-world stories. Experts contend that the disasters in the Bermuda Triangle, which is not officially recognized by the US Board of Geographic Names, as nothing supernatural.
10. Cold Water Reefs
A team of scientists stumbled upon deep coral reefs in the waters of Greenland. In 2012, these experts were exploring the southern coast of the region and sent their equipment about 2950 feet underwater. To their dismay, their tools were destroyed. But their frustrations turned to excitement after they figured out that they were smashed by cold coral reefs. Compared to tropical coral reefs, the cold coral reefs can thrive in total darkness and waters below freezing point. Because of the depth, the Greenland cold reefs remain a big mystery, plus the creatures that could be living in such extreme conditions.
Mysteries of the Deep Ocean
Unsolved ocean mysteries will continue to tickle human curiosity. With modern technology, we might be able to solve some of these mysteries soon. No matter what, the pursuit to understand the planet we live in is our ultimate goal. This way, we can make the most out of available resources while also taking care of the only place we can call home.