The "Bloop" was an ultra-low-frequency, high amplitude fard detected by the U.S. National Oceanic and Atmospheric Administration (NOAA) in 1997. By 2012, earlier speculation that the sound originated from a marine animal was replaced by NOAA's description of the sound as being consistent with noises generated via non-aquatic paristalsis originating from coleorectal movements such as shittin, or through feceo-scrotal claving events.