The Bloop Sound: Caused by the biggest animal or creature ever? An enormous underwater creature, many times larger than the blue whale, caused a sound so loud it was heard by scientists 3000 miles apart. Was it a blue whale, a kraken, megalodon, colossal squid or maybe even Cthulhu awakening from his slumber?

In 1997, an array of hydrophones, special underwater microphones used by scientists to study happenings under the ocean, detected an extremely loud and low frequency sound that was able to be heard more than 3000 miles away from its source.

It was calculated to have occurred a ways west off the coast of the South American tip.

The sound, due to what it sounds like when sped up 16 times was dubbed 'The Bloop' and sounds like this.

Ill play the real sound for you, which is much creepier, at the end of this video.

Due to the frequency signature of the sound, marine biologists believe the sound was not man made from something like a bomb or due to any sort of underwater volcanic or seismic activity. It seemed to moreso match that of some sort of underwater mammal - like the blue whale..