Garrett Reisman could be mankind's answer to Spongebob, with the pair having both lived at the bottom of the ocean.
Now, the engineer and former NASA astronaut has opened up about life on the seabed and his terrifying encounter with a huge underwater creature 'the size of a cow'.
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Yes, the only logical reason for anyone to live under the sea is in the name of science, unless you're a talking mermaid who's mates with a talking lobster.
Anyway, let's get into Reisman's experience - and if we can learn anything from it, it's that thalassophobia, the fear of the ocean, is very understandable as we have no clue what's moving underneath us.
The 56-year-old American was invited onto The Joe Rogan Experience and dived straight into his time 60ft underwater in a submarine-like home on the seabed off the coast of Key Largo, in southern Florida.
Reisman explained how, if he needed to go use the toilet, he had to swim to a gazebo and pull his trunks down to go number two - but the problem with that is that the fish get 'accustomed to it'.
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"So they go there knowing that you're gonna poop?" asked Joe Rogan.
"As soon as you drop in the water at night it's like the dinner bell going off, because this is feeding time," replied Reisman.
He then went into his scariest experience - which just so happened to be when he was visiting the underwater bogs.
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He went on: "You're in the pitch-black Atlantic Ocean 60ft down, no scuba tank at night at with the sound of the ocean lapping against the dome, and you're looking down at this endless black, you know, just a black void.
"You're thinking about every single scary ocean movie like Jaws, you know The Meg, or whatever,The Abyss - all those scary movies, right, and you think about all those things that could be down there - it can't help but go through your head so it's kind of freaky.
"Then you finish and you put your mask back on, and I took a big breath, and I went down, and I opened my eyes in my mask in the darkness with my flashlight and I saw like right in front of me, this huge eyeball like about the size of a saucer."
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Reisman continued: "This big staring, unblinking right at me and I freaked I just tore off."
The former astronaut rushed back to his underwater home and surfaced screaming. His crew rushed over to him, thinking he was bit by a shark, and he explained. So what on earth was it, if it wasn't a shark?
He added: "I'm like 'giant f***ing fish!'... it was a Goliath Grouper."
The huge fish can reach up to 455kg, which is about as heavy as a grand piano, and be up to 8ft tall.
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Yeah, you couldn't get me to live underwater if you paid me £1 million.
Topics: Environment, Science, Space
Joe Yates