John Braje was swimming in Miami Lakes when the 13ft gator - which he said he knows well - approached him.
Footage shows the alligator suddenly bite John's shoulder, prompting him to exit the water as fast as he can.
However, John says he has 'no hard feelings' about the unnerving incident, saying the big guy was probably just 'curious'.
Sharing the video on Facebook, self-confessed adrenaline junkie John said: "SO, I got nibbled on by a 13ft gator today, lol.
"Thinks just because he's bigger than me, that he could bully me!!!
"Haha no hard feelings though. He was just displaying dominance or maybe even just curious.
"IF he wanted a bite, I wouldn't be on FB right now, lol. He's still my buddy & I'll be back in with him soon."
He added: "I've had plenty of interaction with him in the past. I think maybe because there were a lot of people around, he felt he needed to display dominance but normally he's really chill.
"IF he wanted more, he could have got it. That's my buddy."
As you might expect, the majority of the comments remarked on John's stupidity - or bravery, depending on how you see it - with one person comparing him to another bloke who just stayed in the water.
They said: "I don't know who's crazier: you or the guy that just stayed in the water after u got nibbled on."
Responding to the comment, John said: "He's a pro. He's a fifth generation gladesman. He grew up in that water. I'm way better with sharks, lol, he's the gator man but I'm trying."
But while it may seem bizarre to classify an alligator as a mate, John is not alone.
Explaining the role of his four-year-old pet alligator Wally, Joie said: "I went through a real hard depression, and he brought me out of it.
"He was just constantly cuddling and holding me. I'd take a nap and wake up and he'd be laying on my head."
Speaking of how the set-up came about, he continued: "My doctor wanted to give me anti-depressant medicine and I refused to take it.
"30 days later when I went in to see my doctor and she said, 'Well, what did you do? You're doing really good'.
"I said, 'I hung out with Wally!'"
Words: Jake Massey
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