What Is The ‘Bloop’ Sea Monster?

You might have heard of the Bloop sea monster after it became one of the most popular mythological creatures around the world in 1997. The Bloop sea monster was heard again in 2012, but what exactly is it?

The Bloop is noise with an ultra-low frequency recorded in 1997 in the middle of the Pacific Ocean by the National Oceanic and Atmospheric Administration. Some people say it was an unknown sea creature, while others say the sound was caused by an iceberg splitting from Antarctica.

What Is the Bloop Sea Monster?

The Bloop refers to a mysterious loud noise with an ultra-low frequency that was detected in 1997 by the NOAA (National Oceanic and Atmospheric Administration) in the United States.

The noise was picked up by an autonomous hydrophone array at a remote point in the Pacific Ocean. This system is mainly used to monitor undersea noises to detect marine life and migration.

It’s common for whales and other marine creatures to make noises underwater, but these noises are not usually audible from above the surface. However, the Bloop is audible above and below water. It was recorded by land-based stations and underwater hydrophones.

In 2012, NOAA scientists recorded Bloop again in the South Pacific Ocean off Hawaii. Some believe it is caused by an unidentified animal below 2,000 meters of water.

What Is the 'Bloop' Sea monster?

The NOAA website states, “The source of the sound is still unknown. It’s a mystery.” However, scientists speculate that it might be something relatively common, such as the cracking of an ice shelf in Antarctica.

It’s likely to be a common natural occurrence, such as an ice quake signal, because the Bloop’s frequency and time-duration characteristics of the Bloop are consistent and identical. Each year, there are tens of thousands of ice cracking and melting in the sea.

It’s also highly unlikely that the Bloop is a man-made sound, as it would have been heard more frequently if it were an acoustic weapon or another human-made sound. The Bloop was recorded only twice throughout the years.

However the more we increase temperatures at the North and South poles perhaps the more we will hear this sound if it is indeed ice shelves cracking.

What is the Bloop Sound?

Well it’s kind of hard to explain. it rises in frequency quickly and could be heard for 3000 miles, or 5000 kilometres. There Is a video explaining more below.

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Other Weird Ocean Monster Encounters

The Bloop wasn’t the only strange ocean encounter, though. There have been many other unexplained sounds and mysteries in the ocean, such as the mystery of Julia and the HMS Daedalus’ sea serpent.

The Mystery of Julia (1999)

Julia was a mysterious sound heard from the deep ocean. It was also detected by the National Oceanic and Atmospheric Administration (NOAA).

Julia was described as the Bloop’s cousin because of its mysterious and terrifying origin. It was also said that if the Bloop was thought to have come from a large, mysterious creature, Julia would certainly be an even more frightening competition.

Like the Bloop, the NOAA predicted Julia to be a large iceberg breaking or running down aground. That didn’t stop people from spreading rumors that it might have been something much bigger, though.

Pictures spread online claiming that NASA’s Apollo 33A5 captured a large shadow in the water that was larger than the Empire State Building. Many believed that the large shadow was the sea monster, Julia. These rumors were then shut down shortly after by NASA, who stated it was a hoax.

It was then addressed by the NOAA that the scary sound most likely arose from an iceberg breaking. The sound lasted for 15 seconds to 2 minutes, which explains why people were freaked out and thought it was something much bigger than an iceberg.

HMS Daedalus Sea Serpent (1826)

A Royal Navy warship, the HMS Daedalus, claimed to have seen a 100-foot-long snake with a dragon’s head swim by their boat.

It was then spotted a second time by the American brig “Daphne.” The crew members even tried to shoot at the creature and follow it, but it was eventually lost at sea.

Scientists today speculate that the creature both of those ships came across were most likely whales. It remains a mystery what the crew members on both of those ships actually encountered, though.

What is the bloop sea monster - HMS Daedalus Sea Serpent

Why People Think Sea Monsters Are Real

Sea monsters are some of the most persistent myths in human history. From mermaids to sea serpents to the Loch Ness Monster, these mysterious creatures have captured our imaginations for centuries.

But why? There are many theories as to why people believe in sea monsters, but one common thread among them all is that it is a general misunderstanding of the natural world.

When you really look at it, believing in sea monsters can make sense.

For example, sailors have always been some of the most superstitious people on earth. They believed that mermaids were good luck and would come to save them if they were in trouble at sea.

They also believed mermen and other sea creatures existed and kept an eye out for sharks near their boats, which is why they didn’t swim very often.

And let’s not forget about the legend of the Loch Ness Monster, who has been around since the sixth century. Looking at these myths through a historical lens, it becomes apparent that sailors, and people, are afraid of what lurks beneath the ocean.

That’s not the only reason, though. It’s also fun for people to believe that something is lurking under the water that nobody has ever seen. The truth is sea monsters have always fascinated humans, but we’ve never been able to prove their existence.

We are a very curious species, so we always try to figure out more about sea creatures and whether something bigger exists in the world. We also tend to gravitate towards the more exciting possibility, whether they exist or not.

And since we can’t dive beyond 35,853 feet deep into the ocean, we might never know.

We also live in a world where creatures like giant squids, narwhals, and whales exist. Seeing creatures as huge and fascinating as those makes us wonder; if these creatures exist, what else could be out there in the ocean?

We also have articles on other mythical creatures including the “Mokele mbembe” and “Julia” Sounds here on Dinosaur facts for kids.


The Bloop, and other mysterious ocean encounters, are all fascinating to think about. And while scientists have offered various explanations for the Bloop’s source, the mystery remains unsolved.

Whether the sound of the Bloop was caused by a real sea creature or if it was just an iceberg breaking, I think we can all agree that it is very terrifying. You can check out other legendary creatures here on the site like Mokele-Mbembe as well.


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