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Man made shocking discovery when he put Sea Monkeys under a microscope

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Published 16:57 2 Aug 2025 GMT+1

Man made shocking discovery when he put Sea Monkeys under a microscope

The weird little pets have a creepy backstory

Jess Battison

Jess Battison

A man made a pretty shocking discovery when he decided to put his Sea Monkeys under a microscope.

Yeah, those are a blast from the past, aren’t they? Plenty of us grew up keeping the little ‘pets’, often on the kitchen windowsill much to our parents’ disgust.

And they didn’t tend to live particularly long, floating about in their little ‘tanks.’

Although, the ‘Sea-Monkey Dude’ did end up creating the ‘world’s largest Sea Monkey colony’, housing thousands of the pets.

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But while many of us may have kept the weird little things, it’s fair to say few of us even actually understood what they were. Basically, they’re just brine shrimp, sold as eggs and hatching when they’re added to water.

And this YouTuber decided to start putting his under a microscope to get a better look at them.

Not quite what every parent wanted on the windowsill.  (YouTube/Picocosmos)
Not quite what every parent wanted on the windowsill. (YouTube/Picocosmos)

Picocosmos particularly wanted to see what was going on with the gunk and algae growing from the bottom. And when he put some of it under, he found something that ‘kind of creeped him out a bit.’

What he found wriggling around down there were nematodes, tiny little parasitic roundworms that live all over the world, including beneath his Sea Monkey tank.

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The ‘pets’ doing a bit more once they get to be six months old, as they might start fighting over who gets who.

If after about six months of having them you see a pair of Sea Monkeys stuck together and only one of them has whiskers. then that's a mating pair and you might expect more Sea Monkeys to appear in the near future.

But if there's anything you ought to be 'creeped out' by when it comes to Sea Monkeys, it's the man who invented them, one Harold von Braunhut.

Creepy. (YouTube/Picocosmos)
Creepy. (YouTube/Picocosmos)

As well as deciding that Sea Monkeys would be a great children's present, he also invented a number of other gifts for kids including X-Ray specs, a monster card that grew hair when you put it in the water and the 'invisible goldfish', which was just an empty fishbowl and some fish food.

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It’s also said Braunhut bought weapons for the Ku Klux Klan and regularly attended neo-Nazi group meets.

The inventor of Sea Monkeys being a massive white supremacist wasn't something he even tried to hide, when asked about it in an interview he once said: "You know what side I'm on. I don't make any bones about it."

Hmm, creepy toys from creepy guys.

Featured Image Credit: YouTube/Picocosmos

Topics: Nostalgia, Science, Weird

Jess Battison
Jess Battison

Jess is a Senior Journalist with a love of all things pop culture. Her main interests include asking everyone in the office what they're having for tea, waiting for a new series of The Traitors and losing her voice at a Beyoncé concert. She graduated with a first in Journalism from City, University of London in 2021.

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@jessbattison_

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