Trout fishermen at a Kent reservoir were fearful after the peckish predator swam across to them in the hopes of snagging fresh trout left in the water.
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In a video the crafty creature can be seen patiently lying in wait for the fisherman to hook the fresh fish meal.
The sneaky serpent then sat on top of the fish as it laid claim to the catch in the Bewl Water reservoir near Lamberhurst.
Crafty: The snake lies in wait as it plots to grab a delicious fish meal
The serpent keeps a close eye on the fisherman
Fisherman Keith Perry, from Sidcup, said: "At first the snake made me jump as it swam over quite quickly and then seemed to be guarding my fish as though they were his.
"It sat on top of my catch and seemed to be telling me to keep away from his meal.
"My friend Googled the snake to identify what type it was then when we realised it was harmless, we carried on fishing. Apparently they eat frogs and so you find quite a lot of them around waterways.
Scared? The fishermen were panicked when they realised they had an unwelcome guest watching their every move
Chilling out: The snake appeared relaxed as it lolled about in the water
"He seemed to be quite hungry and was hanging around other fishermen - it seemed utterly unafraid of humans. I think it found our fish a bit too big to eat though."
Undeterred the snake continued to inspect the fish and swam around his new best friends as they fished.
In March last year a man was seen bizarrely taking his snake for a swim in the ocean while sipping a beer in Australia.
In the clip, the man throws the reptile into the water several times, in what appears to be some sort of 'game' between the pair.