Explorers have unearthed some of the most remarkable things at the bottom of our ocean, but some of these discoveries have remained a mystery ever since they were found. The ocean is boundless and scientists are puzzled at some of the miraculous discoveries found over the millennia.

From tiny bacteria gathering in large numbers to create a mysterious bright glow that looks like it can be seen from space to an "immortal jellyfish" that never dies and may hold a cure for cancer, there are mysteries lurking in the depths of the ocean that seem like they will never be explained. These crazy ocean discoveries have had the most brilliant scientists stumped and conspiracy theorists have come up with their own explanations about these underwater discoveries.

These 10 ocean discoveries even scientists don't understand are baffling and might remain a mystery for a long time. Who knows what else is lying at the very bottom of the sea?

10 Bacteria Gathering In Such Huge Numbers To Create A Milky Phenomena

It wasn't until 2006, that scientists were able to capture a satellite image of this mysterious glow in the water, and several years later, concluded that the glow was from bioluminescent bacteria. However, scientists are still unsure how or why the bacteria gather in such huge numbers and why they have a constant glow as if they want to be seen from miles away.

9 A Curious Purple Orb

This small and mesmerizing orb was found at the bottom of the ocean floor in California and given the nickname, Blobus purpilis. Explorers initially believed this strange blob was a spider sac or small octopus, but research is still ongoing as to what it is exactly. Some researchers believe it is a type of snail.

8 An Immortal Jellyfish That Can Cure Diseases

Given the nickname "immortal jellyfish" for its ability to revert back to a polyp stage when it is starving or in danger, and basically escaping death, researchers believe this jellyfish may hold the cure to cancer. Scientists are still stumped as to how this jellyfish is able to transform itself back to its juvenile polyp state and how its cells are able to literally hit the reset button.

7 The Bermuda Triangle Is An Ongoing Mystery

The Bermuda Triangle lies between Bermuda, Miami, and Puerto Rico and is said it be a mysterious region where planes and ships have vanished and disappeared without a trace. While there isn't any evidence that there is some sort of supernatural phenomenon going on, researchers believe that natural occurrences like hurricanes and changes in weather could be the explanation for these disappearances, but it's still all up for debate.

6 The Mariana Trench Has Only Been Visited By Three Explorers

The Marianas Trench is the deepest point on Earth and is located off the Mariana Islands near Guam. Only three scientists have made their way to this rarely explored part of our ocean including filmmaker James Cameron. Explorers will find themselves in total darkness as they continue to understand what else lies in the deepest parts of the ocean and how marine life manages to survive.

Related: Lost City Of Atlantis: 25 Things We Thought Were True (But Are Actually False)

5 An Ancient Mystery Off The Coast Of Japan Puzzles Scientists

One of the biggest mysteries in Japan lies in its ocean off the southern coast of the Ryuku Islands and has been dubbed Japan's Atlantis. Researchers discovered an underwater complex and are unsure whether it was man-made or a natural underwater formation. Some people believe the Yonaguni complex is what's left of a fabled Pacific civilization named Mu.

Related: 20 Creatures At The Bottom Of The Ocean That Make Even The Tough Guys Squirm

4 A Flowing River At The Bottom Of The Black Sea

There is a river flowing along the bottom of the Black Sea that is complete with trees,  leaves, and ever waterfalls, and has been an intriguing aspect of the ocean since it was found. According to scientists, if the river was on land, it would be the sixth-largest river in the world in terms of the volume of water flowing through it.

3 Unexplained Sounds Made By Creatures Or Icebergs?

In 1997, an odd "bloop" sound was recorded in the South Pacific that made many people believe an underwater creature was lurking in the waters. Scientists later announced that the odd noise was just icebergs breaking off glaciers. However, many conspiracy theorists didn't accept their reasoning.

Related: 20 Images Of Strange Things We Can Only Find At The Bottom Of The Ocean

2 Little Is Known About The Largest Animal On Earth

Scientists know very little about the blue whale because sadly these giant creatures are near extinction thanks to whaling trade hunting and slow reproduction rates. The blue whale is enormous and can range in length from 80 to 100 feet. These beautiful creatures are also known to be very shy, making it hard for researchers to learn more about them.

1 Is The Baltic Sea Anomaly An Alien Artifact?

In 2011, explorers found this oval-shaped objects with mysterious markings on it on the ocean floor on the bottom of the Baltic Sea. The discovery looked like something out of a Star Wars film and many people believed it was a spaceship that sunk to the bottom of the ocean. Scientists believe it is just a glacial deposit, but who knows?

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