The WWI Sea Monster That Took Down a German U-Boat—And Vanished

General History
By Jasmine Hughes

World War I was brutal, bloody—and according to one German commander, full of sea monsters. On April 30, 1918, a bizarre encounter shocked both British and German naval officers. After his surrender, U-boat Captain Gunther Krech gave an account so strange, it’s still debated today. Here’s the chilling tale, one unbelievable detail at a time.

1. A Surrender Like No Other

© WELT

When the German U-boat UB-85 surfaced off the coast of Ireland, the crew didn’t fight—they surrendered immediately to the British ship HMS Coreopsis. That alone was strange. Most U-boat crews scuttled their vessels before capture. Surrender without resistance was almost unheard of during the war. What could compel such a seasoned crew to give up so easily? The scene was set for a story that would transcend typical warfare narratives. The surrender was as swift as it was odd, casting a shadow of mystery over the entire incident and setting the stage for Captain Gunther Krech’s astonishing tale.

2. The Captain’s Bizarre Explanation

© Daily Mail

British officers were stunned when Captain Gunther Krech explained why they were so willing to give up: they’d been attacked by something not human. Not British. Not of this world. A “sea creature,” he said, had crippled their submarine. His tale defied belief and stirred imaginations. It wasn’t just fear; it was an encounter with the unimaginable. The seriousness in Krech’s eyes, however, left little room for doubt in the minds of his captors. This explanation was more than just a story; it was a revelation that challenged logical reasoning and opened a Pandora’s box of speculation.

3. A Monster in the Night

© Cryptid Wiki – Fandom

According to Krech, the U-boat surfaced the night before to recharge its batteries. That’s when a beast erupted from the sea and climbed onto the deck. He claimed the crew opened fire, but it was too late. The creature, larger than life, defied natural laws. This was no ordinary marine animal; it was something out of legends. The night was filled with chaos and terror, as men faced what seemed to be a figment of nightmares. The darkness of the sea cloaked the beast, making its sudden appearance both horrendous and awe-inspiring.

4. A Submarine Torn Open

© Historic Mysteries

The “creature” damaged the U-boat’s forward deck and conning tower before slithering back into the deep. The ship, Krech said, could no longer dive and was vulnerable to attack—forcing them to surrender at first light. The damage was not just physical but psychological, leaving the crew in shock and despair. The image of their reliable vessel in tatters was haunting. Stranded on the surface, the U-boat became a sitting duck, its once formidable presence now reduced to vulnerability and defeat. It was a sight that etched itself into the memories of those who witnessed it.

5. What Did They See?

© The Guardian

Krech never gave a full description of the creature. But whispers from crew accounts described glowing eyes, slick skin, and a massive, eel-like body. Some claimed it was over 60 feet long. The ambiguity of the descriptions left much to the imagination. Was it a creature of myth or a reality yet to be discovered? The sketchy details only added to its mystique. Each crew member seemed to have seen something slightly different, yet all accounts pointed to an awe-inspiring and terrifying presence. This cryptic vision has fed countless speculations and folklore over the years.

6. A Convenient Cover Story?

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Skeptics say Krech invented the monster to hide technical malfunctions—or embarrassing human error. The U-boat was supposedly poorly maintained, and a mechanical failure may have forced their hand. It was a story that could conveniently shift blame away from the crew’s inadequacies. Was Krech a brilliant storyteller or a desperate commander? The possibility of a cover story added another layer to the intrigue. While some saw it as a rational explanation, others questioned why a seasoned captain would resort to such an unbelievable tale if it were all a fabrication. It remains a topic of heated debate.

7. Or Something More?

© The Viking Herald

But others aren’t so sure. Cryptozoologists (yes, that’s a thing) have long speculated about unknown creatures in the North Atlantic. Some say this attack matches legends of a Kraken or a prehistoric plesiosaur. Could there be credence to the captain’s wild claims? The mystery deepened as more theories emerged. Enthusiasts of the unexplained found in this tale a new puzzle to ponder. The idea of a surviving prehistoric creature lurking beneath the waves was tantalizing. Could this encounter have been a rare glimpse into the hidden world of the ocean’s depths? It’s a question that still fascinates scientists and storytellers alike.

8. Records Confirm the Capture

© Britannica

This wasn’t just sailor’s gossip. Official British naval logs from April 30, 1918, confirm the capture of the UB-85 by the HMS Coreopsis. The crew was taken prisoner, and the U-boat did not resist. These records lend credibility to the event’s factual basis. It wasn’t just a tale spun by imaginative seamen; it was documented history. The records provide a tangible link to the past, offering a glimpse into the bureaucracy of wartime documentation. They serve as a reminder that even the most incredible stories can have a foundation in reality, challenging us to separate fact from fiction.

9. The U-Boat That Disappeared

© Historic Mysteries

After its capture, the UB-85 was lost to history. Some say it sank during towing. Others believe it was studied in secret. No wreckage has ever been found. The vanishing act only adds to the mystery. How does a vessel simply disappear without a trace? Theories abound, each more intriguing than the last. Was it incompetence, a deliberate act, or something more sinister? The absence of the wreck leaves room for endless speculation, turning the UB-85 into a ghost ship of sorts. Its disappearance is as beguiling as the tale of the sea monster that supposedly brought it down.

10. The Tale Resurfaces a Century Later

© Cryptid Wiki – Fandom

In the 2000s, the story went viral when marine archaeologists searched for lost WWI U-boats. While exploring sunken German subs, they came across accounts of “the sea monster attack.” The internet, of course, went wild. The tale found a new audience, sparking debates and curiosity. Modern technology met ancient myth, creating a fusion of fascination. The resurgence of interest highlighted how stories, no matter how old, can captivate the imagination anew. The blend of history, mystery, and technology brought the UB-85’s story back into the limelight, proving once again the enduring power of a good sea yarn.

11. A Monster or Myth?

© The Sun

Whether it was a monster, a malfunction, or a morale-saving fib, one thing’s certain: something made the crew of a deadly German submarine surrender without a fight—and they blamed a beast from the deep. The story endures as a compelling narrative of fear and imagination. It challenges our perception of reality and pushes the boundaries of what we accept as truth. The tale of the UB-85 is a testament to the human capacity for storytelling and our never-ending quest to explore the unknown. As long as there are mysteries of the deep, stories like this will continue to enthrall.