The Bloop, a noise which sounds much like it’s spelled, was recorded in 1997 in the southern Pacific and became a modern mystery.
And with only 5% of the ocean explored by humans, the unexplained phenomenon was ripe for conspiracy.
Theories included covert Navy operations, an army of giant squids, and even… mermaids.
Adding fuel to the fire, a mockumentary called Mermaids: “The Body Found was released on Animal Planet — better known for legitimate nature documentaries.
“Maybe this is why dolphins help humans when in danger in water?”
In the sensational show, The Bloop became a tortured screaming sound described as “more complex” than anything a whale could emit by actors portraying scientists.
And viewers were hooked — with the cheeky hoax getting a sequel and now now doing the rounds on social media.
Despite the faux-science video containing a disclaimer it wasn’t real in the end credits, many viewers remained convinced that mermaids exist.
Commenting on the video on Youtube, one truth-seeker said: “I strongly believe mermaids exist, just that they’re weirder looking than we imagine.”
“I cried when the mermaid cut himself to save others from the megalodon,” said another.
“Maybe this is why dolphins help humans when in danger in water?” suggested another.
Another conspiracist said: “Dolphins are really friendly to us, why?
“Killer whales don’t intentionally smash our boats, why?
“There’s something down there that resembles us and they’re friendly. That’s why.”
The underwhelming truth behind The Bloop was revealed in 2012 and sadly it had nothing to do with sea monsters.
According to the National Oceanic and Atmospheric Administration, The Bloop has been confirmed as an “ice quake”.
Despite this, an underground — or underwater — movement of “real” mermaids have been taking the world by storm.
Women have even quit their jobs to don giant fish tails and frolic around in lakes.
In 2014, the first-ever “mermaid academy” opened in Spain, with students living the fantasy of Disney’s own Ariel.