https://www.youtube.com/watch?v=OBN56wL35IQ Possibly the most famous of the deep sea recordings, The Bloop has long mystified scientists as to its true origins. This noise, along with several other 'bloops', are the loudest sounds ever to be recorded in the Earth's oceans. Hypothesis of The Bloop's origins have ranged from calving icebergs to unimaginably huge creatures lurking in depths of the ocean.