a catalogue of documented anomalies on planet Earth // maintained by the Aliens
> RECORD OBS-0749 | status: DEBUNKED | filed 2026-07-31
Home > Unexplained > The Bloop as Unknown Sea Creature

The Bloop as Unknown Sea Creature

RecordOBS-0749
CategoryUnexplained/Maritime Mysteries
StatusDEBUNKED
SummaryThe Bloop was an ultra-low-frequency underwater sound detected by NOAA in 1997. Some speculated it was a giant unknown creature, but it was later attributed to ice calving. The sound remains a popular cryptid-related mystery.
OriginDetected in 1997 by the U.S. National Oceanic and Atmospheric Administration (NOAA) in the Pacific Ocean.
Claimed
  • The sound was made by a giant undiscovered sea creature.
  • It could be a covert military exercise or unknown natural phenomenon.
  • The sound's amplitude suggests an animal larger than any known species.
Evidence / consensusNOAA and other researchers attribute the sound to the cracking and calving of icebergs.
> OBSERVER NOTE:
The Bloop's frequency and pattern matched icequakes, not biology. Cryptid enthusiasts still cling to it, but the evidence is clear.

Sources

  1. BBC Radio 4 - Tracks - Eight mysteries from the deep sea

Sources are external and provided for verification. Listing does not imply the Observer endorses their claims.