What Was the Julia Sea Monster?

The Julia sea monster is one of many mysterious creatures reported throughout history. Only known from an incredibly loud sound heard by the National Oceanic Atmospheric Administration and named Julia. Descriptions of what this sound was vary, from a huge marine animal to an iceberg breaking and scrapping we take a look what exactly was the Julia sea monster?

The Julia sound is a mysterious and very loud sound recorded in 1999 by the National Oceanic and Atmospheric Administration (NOAA). Although officially explained as either an icequake, or an iceberg running aground in Antarctica there are still some who believe it is evidence of a massive sea creature.

These, somewhat unexplained ocean sounds, have spiked a lot of interest as people argued on what the sounds organs could be. This has led to the emergence of many theories that try to explain the Julia sound, some of which are a lot more interesting than others!

In this article, we try to explain the most common of these theories, to learn more about the Julia sea monster and the myths and theories surrounding it.

What was the Julia Sea monster, julia Sound

The Julia Sea Monster

On March 1st, 1999, the National Oceanic and Atmospheric Administration (NOAA) recorded an incredibly loud sound from underwater.

The only explanation NOAA could provide that made sense was that the sound was caused by an iceberg breaking or running around. However, the sound did not quite match what you normally hear from an iceberg breaking, although this was later explained as water and the vast distance changing the sounds as they traveled.

However this uncertainty is why more interesting theories emerged to explain the sound.

Many believed it came from a sea monster, which was named Julia. This claim is supported by the fact that the Pacific Ocean was big enough to fit a creature of unimaginable size and that less than 90% of the ocean has actually been explored. Leaving, for sure, a lot of sea life never seen or encountered. including this to a huge sea monster might be a bit of a stretch though.

There have been many other speculations about the true nature of the Julia Sea Monster.

  • Some speculate that Julia was some type of unknown aquatic creature or an undiscovered species.
  • Others speculate it was a known aquatic creature, such as an whale or a giant squid.
  • Another theory suggests that the monster could have been a prehistoric animal thought to no longer exist today.

Still, without physical remains, it is difficult to say what this creature was for sure. And that is the key, it is important to note that there has been no real evidence of the existence of this exotic sea monster or any other type of animal.

Were There Any Pictures of Julia?

Hearing about this fascinating creature made people want to believe that it existed. In fact, a picture of Julia spread around online that was claimed to have been taken by NASA’s Apollo 33A5.

The picture showed a large shadow in the waters of Cape Adare, Antarctica, at the time the sound was recorded, and this shadow was two times larger than the Empire State Building.

It had people certain that what they saw was Julia. The timing was right, and the sound was so loud that people automatically associated it with the picture.

Unfortunately, the picture was a hoax, as no such NASA mission existed. It is unclear where the picture originated, but people’s desire to believe Julia was a real sea creature fooled them into believing that the picture was real and in the days when doctored photos were less common, and well known so it caused quite a stir!

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Was Julia the Sea Monster Louder Than the Bloop?

If you are already familiar with Julia, you might have heard of the Bloop. We have an article on this sound ( or sea monster depending what you read) here on the site as well.

Julia was known as the Bloop’s cousin because of how similar they were when it came to mystery and chilling origin. Like Julia, the Bloop is a mysterious sound recorded a few times over the years, and its mystery remains unsolved.

The two sounds were heard in the Southern Pacific Oceans and had extremely high frequencies, but which alleged monster was louder?

Julia was loud enough to be heard across the Pacific Ocean at a range of 3,000 miles, and its noise lasted for 15 seconds to 2 minutes. Meanwhile, the Bloop’s noise was heard across the Pacific Ocean at a range of over 3,100 miles and lasted for one minute.

Despite this information, it is unclear whether Julia was louder than the Bloop or not.It is enough to say a sound that can be heard 5000 km ( 3100 miles) is very VERY loud!

Julia the Sea Monster and the Bloop: Size Comparison

When it came to the question of which monster would have been bigger, if it was of course a sea monster) was, people were split.

Some thought the Bloop would be larger, while others thought Julia would be much larger. Most seemed to think that the two would be about equal in size, but no one could say for sure without seeing either of them firsthand, which of course no one has done.

The official explanation for both the Julia and Bloop sounds in that they are either icebergs running around or Icequakes in the antarctic ice shelves.

Julia the Sea Monster

When people imagine Julia, at least as a living animal rather that an iceberg, they typically envision a terrifyingly gigantic sea creature.

After the infamous image of Julia was released online, people were able to determine how big it really was.

The image released online showed Julia two times larger than the Empire State Building. The Empire State Building is roughly 443 meters long to its tip, which makes Julia 886 meters long; just imagine a creature as big as that!

The Bloop

On the other hand, the Bloop was suspected to be between 77 and 215 meters long, which is way less than half of what Julia measured. Moreover, its teeth were described as vicious and measured nearly the length of a human arm.

It is safe to say that Julia was, in peoples’ imagination at least, much larger than the Bloop. Some even speculate that Julia may actually be a larger species of the Bloop or at least related to it in some way.

As we have explained, as feel the need to be crystal clear on this, they were most probably related, though not in terms of sea monsters, but in term of icebergs!!

What was the Julia Sea monster, julia Sound

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


Julia the Sea Monster is definitely one of the most interesting mysteries we’ve come across. Known as the Bloop’s more terrifying cousin, this sound has got thousands of people curious about its true nature.

Despite that, there is still no real evidence for the existence of Julia the Sea Monster or the Bloop, meaning the mystery remains unsolved. What do you think? Do you think these giant sea creatures are lurking in the ocean and are we yet to discover them.


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