Aliens Incidents Declassified Esoteric Places Creatures People Rabbit Hole

Home › Declassified › Sonar Anomalies › The Biological Signal With Metallic Harmonics

The Biological Signal With Metallic Harmonics

Key related concepts

The Bio Duck Sonar Mystery
The Bloop Acoustic Anomaly

Continue the trail

PreviousThe Bio Duck Sonar Mystery NextThe Bloop Acoustic Anomaly

Archive file

Archive Code: 0017
Category: Sonar Anomalies
Section: Declassified

Related

The Bio Duck Sonar Mystery
The Bloop Acoustic Anomaly

More in Sonar Anomalies →

© 2026 Project Black Echo. All signals reserved.

Contact About Sources