Niall McCann, a 29-year-old biologist from Cardiff, pounced on the slithering jungle giant when he happened across it on a bank of the Rewa River in Guyana.
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| Enormousss ... three men struggle to lift the heavy serpent |
The monster reptile weighed around 100kg and had a 27in girth.
Niall is an avid adventurer and has rowed the Atlantic and trekked across Greenland's Polar Ice Cap.
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| Caught ... the anaconda's deadly mouth is tape shut |
He has a passion for handling creatures that would petrify most people and had always dreamed of catching one of these massive snakes.
He said: "I'd always dreamed of seeing an anaconda and I knew that our work in Gcondauyana would give us a real possibility of seeing one.
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| Predator ... anacondas squeeze their prey to death before swallowing them whole |
"I was trying to hold its head to the ground and it kept trying to turn its head to bite me - it was a wrestle.
"Its strength was amazing and when a ripple went through its body it shook all of us."
Anacondas are the heaviest snakes in the world and can weigh up to a whopping 250kg.
They squeeze their prey to death before swallowing them whole, and have been known to attack jaguars and humans.
