ocean mysteries don't just pertain to the creatures that live in it sometimes researchers or divers will hear something coming from the depths of the ocean that is both terrifying and seemingly mysterious from some of the classics like the bloop and julia to the sounds of underwater volcanoes and earthquakes all the way to some super strange sounds coming from actual marine creatures what is up top 10 fam welcome back i am your host today olivia kozolovsky and today we are diving in as we cover the top 10 terrifying signals heard by submarines starting off this list in our number 10 spot we have this haunting call whales truly are some of the coolest animals on earth and humpback whales are no exception the males of the species are known for their songs which last from 10 to 20 minutes and are actually pretty complex they will repeat these songs for hours at a time and it honestly isn't exactly known why they sing these songs at all all the males in the group will produce the same song and it will change seasonally the females are also able to produce noise but for some reason it is only the males who seem to INDIAN URBAN LEGENDS produce these long songs it is unclear how the whales even produce these sounds however because they don't actually have vocal cords this is all super cool and interesting but the whole reason you're here is for the sound so let's take a listen to a more haunting track released by the humpback whale [Applause] okay so please tell me i'm not alone in thinking that that was the most beautifully haunting sound i've ever heard come from the sea but also imagine being alone in the ocean not knowing what that was and then hearing it probably pretty terrifying right at least we're all safe here in youtube land in our number nine spot today we have this marine chorus okay so out of context if i played you this sound what would you think it is definitely not something underwater right well as it turns out this sound was indeed captured under the water and these are the sounds of fish calls while i always expected the chorus of marine animals to sound a little more similar to the stylings of sebastian the crab apparently that isn't even close okay i'm not gonna lie i didn't even know that most fish had calls but it turns out that our human ears just can't perceive all of the hoots moans barks and chirps that take place in the vast seas this recording actually helped scientists realize that there are fish who sing together in a chorus every day at dusk and dawn there have now been around 800 species of fish that have been identified and confirmed to make some form of noise and apparently some fish even engage in shouting matches in noisier parts of the ocean which is kind of hilarious to imagine i guess on the list of creepy noises this one is less creepy and more just informative in our number 8 spot today we have the whistle this is a sound that was first recorded in 1997 by the noaa and was the source of many mysteries for years while people speculated about what may have caused the sound while it still isn't exactly clear it is now believed that the sound may have come from an underwater volcano eruption if you didn't know underwater or submarine volcanoes are located in all oceans on our earth and they're extremely interesting there are certain kinds of marine animals that only exist near these extreme environments many submarine volcanoes are located near the areas of tectonic plate formations which are also known as mid-ocean ridges there's a youtube user called some canadian and they left a comment on a video of this whistle sound that pretty much sums it up exactly BLOODY MARY URBAN LEGENDS first we'll listen to the sound played at 10 times the original speed the comment read quote it could be the sound of something moving through tunnels one volcanic eruptions and gases two something big and hungry you choose i think they might really be on to something there in our number seven spot today we have blue why are all the weirdest ocean sounds first recorded in 1997. bloop is another one that came from that year and it was a loud and unusual sound that was placed as occurring several times off the southern coast of south america and it was so loud that it could be heard over 5 000 kilometers away at first researchers were confused because while the sound was actually similar to known sounds of living creatures it was just way too loud that not even the blue whale the largest living creature could have produced it so what is it then well as it turns out it is in fact not the kraken and instead it is actually consistent with ice quakes that are generated by large icebergs as they crack and fracture it seems like this sound going with that explanation doesn't really make sense but hey i'm no scientist but here's the sound for you to judge for yourself in our number six spot today we have the western pacific biotwang in 2014 researchers and scientists heard weird sounds coming from the mariana trench which for the record seems like the worst place for there to be strange noises coming from for years experts couldn't pin down this sound and it was dubbed the western pacific biotwang and while there is now a theory that was proposed by researchers from oregon state university they have also said that they might be entirely wrong first for reference here's a little clip of the sound i'm talking about okay so if you're like me my mind immediately went to something alien related or some sort of creature that perhaps we haven't yet discovered i mean this is the mariana trench we're talking about the theory put forward by the oregon state researchers was that perhaps this may be a new type of baleen whale call okay that's probably the best of all of the options but i really don't like when someone tells me the answer to a scientific mystery only to TOP SCIENCE FACTS tell me that that might not actually be the answer at all while the low part of the sound would make sense to attribute to the baleen whale it's the end high-pitched twangy part that would be incredibly unique the wide range of frequencies in the sound are what continues to baffle those who are trying to find the source of this mysterious sound in our number five spot today we have julia julia is a sound that was recorded in 1999 by the u.s national oceanic and atmospheric administration or noaa which i've already talked about today it sounds like it could be straight out of a horror movie so considering it was a sound that came from our ocean and at first no one could tell where it had come from it really was quite frightening the sound has now likely been demystified as researchers are pretty positive they know the origin of it it is now believed that this sound was caused by an iceberg running aground off antarctica the sound however was insanely loud it was so loud that it could be heard over the entire equatorial pacific ocean autonomous hydrophone array researchers were later able to narrow down what they believe may have been the point where the sound originated although they've never actually been able to pinpoint it exactly most of the time when people hear the julia sound they hear it sped up at 16 times the original speed but today we are going to listen to a clip of the sound at regular speed because i think it is much more eerie this way in our number four spot today we have knock okay this is one that'll admit was not captured by a submarine but it was still underwater and it truly is terrifying a few years ago a beluga whale named knock who was unfortunately in captivity was recorded as he swam below the water beluga whales have been called the canaries of the sea and for good reason but knock really wanted to up the ante and instead blessed us all with this sound [Music] knock had this uncanny ability to mimic the rhythm and tone of human voices and it truly is kind of frightening it of course is also a little sad as part of this was probably because he spent most of his life being forced to listen to human speak because he was being held in captivity before this recording of knock the voices of belugas and their sometimes human-like sounds have been talked about but knock was the first time it was recorded and honestly i kind of wish it hadn't been in our number three spot today we have the bioduck since the 1960s this sound has absolutely stumped researchers who heard it this sound was basically what the name attributed to it would suggest it sounded like some sort of mechanical duck for decades researchers would hear this sound and it would often be heard and recorded again in the spring and winters after all of these years though it seems as though the answers to this mysterious sound are finally coming to light in 2013 researchers attached sensors that collect acoustic data to two whales one of those tags recorded for 18 hours and the other for eight and the whales they were attached to were traveling with other whales in groups of five to forty and they were all eating basically the entire time throughout this time with the tags on the whales there were a total of 32 calls heard and this data is what led researchers to finally understand where the bioduck sound was coming from as it turns out this mysterious sound was actually the call of the mink whale researchers still aren't exactly clear as to what the call means to the whales but it was a fantastic discovery that finally closed an almost 50 year old scientific mystery in our number two spot today we have up sweet we all know how little we know about the ocean and that also includes what kind of creatures lie in it so while this mysterious sound out of context probably wouldn't be that freaky when put into this situation it becomes quite a bit more eerie this sound is referred to as upsweep and it was caught when the pacific marine environmental laboratory started its sound surveillance system in august of 1991. the sound is apparently more seasonal with its peaks in spring and fall but it is unclear if the changing of seasons is responsible for this sound or if it's coming from something that lurks in the ocean and remains undiscovered just for reference here's a clip of that sound played at 20 times the original speed it is possible that this sound could be coming from underwater volcanic activity but it is also possible that it's not so who really knows in our number one spot today we have an earthquake okay so to add another creepy mariana trench sound to this list we have one that was taken from the bottom of the challenger deep in fact it was the first ever sound recording to be taken from the bottom of the challenger deep so it's a pretty cool scientific advancement as well as a terrifying sound despite the crushing pressures and the fact that there's no sunlight the challenger deep is actually pretty noisy and that is because of the fact that sound travels a really long way underwater which ends up kind of turning the challenger deep into a sort of echo chamber of oceanic sounds so while the recording was able to pick up things like the sound of a boat almost 11 kilometers overhead and the sounds of whale calls they were also able to pick up the sound of a magnitude 5 earthquake rumbling near guam on july 16 2015. i'm not gonna lie while being one of the scariest things i've ever heard this is also one of the coolest things i've ever heard in my life too science really is just so cool sometimes alright guys that has been our list for today thank you so much for checking it out don't forget to hit that thumbs up button if you enjoyed the video today and as always subscribe i've been your host today olivia koslowski and i'll see y'all next time bye [Music] you
