Mysterious Deep Sea Sounds Finally Identified

Cryptozoology

Mysterious Deep Sea Sounds Finally Identified

In a fascinating exploration of the ocean’s depths, marine biologists have finally identified the origins of several mysterious underwater sounds. These sounds, previously thought to be unexplainable, have been traced…

March 10, 2025 • 3 min read • Art Grindstone

Art Grindstone is the hard-nosed storyteller behind Unexplained.co, a veteran investigator whose life’s work sits at the crossroads of the paranormal, fringe science, and the shadows most people try not to look into. With decades spent chasing impossible stories — black-budget psychic programs, vanished Cold War experiments, desert rituals that sparked UFO waves, and the strange phenomena buried in America’s forgotten backroads — Art brings a rare combination of skepticism, awe, and journalistic precision. He’s not here to debunk. He’s not here to blindly believe. He follows the evidence wherever it leads — even when it leads someplace deeply uncomfortable. Known for his immersive, cinematic style and his ability to turn obscure research into gripping narrative, Art has built a devoted following across podcasts, long-form features, documentaries, and serialized investigations. His interviews are direct. His analysis is unflinching. His voice has become a staple in the modern paranormal renaissance — the guy people turn to when a story is too strange, too complex, or too dangerous for anyone else to touch. Off-mic, Art works with a distributed network of researchers, archivists, and field operatives who help surface the stories mainstream media ignores. On-mic, he transforms their findings into meticulous, high-impact reporting that refuses to insult the intelligence of true believers. His philosophy is simple: Take the phenomenon seriously. Treat the audience with respect. Tell the story as if the world depends on it — because sometimes it does. When Art Grindstone digs into a case, he isn’t just chasing a mystery. He’s tracing the fault lines of reality itself.

In This Report(8)

In a fascinating exploration of the ocean’s depths, marine biologists have finally identified the origins of several mysterious underwater sounds. These sounds, previously thought to be unexplainable, have been traced back to specific marine creatures, shedding light on the complex communication methods of ocean life.

Key Takeaways

The Biotwang sound was recorded near the Mariana Trench and is linked to Bryde’s whale.
The Bioduck sound has been a mystery for decades, possibly linked to Antarctic minke whales.
The infamous Bloop sound was identified as an icequake, not a marine creature.

The Enigmatic Biotwang

The Biotwang is a mysterious underwater sound first recorded in 2014 near the Mariana Trench. It begins with a deep rumble, reminiscent of a humpback whale’s call, but concludes with a strange high-frequency component that sounds almost synthetic. Initially, researchers believed it was a marine mammal, but identifying the exact source proved challenging.

The Bioduck Mystery

Another intriguing sound is the Bioduck, first recorded in the Southern Ocean in 1960. For years, it was considered the largest unresolved mystery of the ocean. The Bioduck can be heard year-round in the Antarctic, with its seasonal patterns suggesting a widespread distribution or a complex migration pattern among different populations.

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The Bloop: A Famous Sound

Perhaps the most famous unidentified sound is the Bloop, recorded in 1997. This sound was so loud that it was detected by underwater microphones over 3,000 miles apart. Initially thought to be from a marine mammal, it was later identified as an icequake, caused by the movement of large ice masses.

The Role of Sound in Marine Life

Marine mammals, such as dolphins and whales, rely heavily on sound for communication and navigation. Unlike land mammals, their other senses are limited underwater. Sound travels faster and farther in water, making it an essential tool for these creatures. For instance, fin whales use sound channels to communicate over long distances, while the U.S. Navy has utilized underwater sound surveillance systems for tracking purposes.

Identifying the Biotwang

After extensive research, scientists linked the Biotwang to the Bryde’s whale. This identification was made possible through the analysis of recordings from NOAA’s hydrophone array. Researchers discovered that Bryde’s whales were present whenever the Biotwang was recorded, confirming their role in producing this unique sound.