Chilling footage shows a woman being branded a 'vile b**** who should be drowned" because she was fishing.
Elsa Joan said she was left in "pure shock" following the exchange with a woman in Dartford, Kent, last weekend.
Elsa, 24, had set up a tripod to capture her freshly-captured carp at Brooklands Lake in her hometown, and was able to capture the two-minute tirade.
The unexpecting fishing enthusiast was called a "vile b****" and a "f****** w****"" by a complete stranger during the chilling exchange.
As the young factory worker scooped her catch into a bag to be released back into the lake, the woman told Elsa that she "should be drowned".
Water company pours raw sewage into river for 23 hours - killing 5,000 fishElsa said the woman eventually walked away but continued to shriek in rage from afar - despite seeing that she had already set the 10lb fish free.
The experience left the carp catcher 'completely in shock' and surprised by her own patience in the face of the outburst.
Elsa said: "This woman walked past, and just went absolutely crazy. It took me completely in shock.
"She had an aggressive demeanour. Her aggression just got worse and worse from the start.
"I thought, 'I have to keep my cool for the safety of the fish'. It always comes first in carp handling. That's why we have mats, big nets and equipment for carp care.
"Straight away I knew it was going to get a bit irate, and I didn't think I had the patience. But clearly, I proved myself wrong.
"If I had said anything apart from what I kept saying - 'it's a fishery' - I would have got angry.
"[After] I put the fish back in the water to be released and it swam off, I was like 'f*** off'. Nothing is going to stop me from losing my s*** now."
Straight after the impromptu fight, Elsa reported the incident to the Brooklands Lake bailiff.
Now, the authority of the lake and its regulars are on the lookout for the mysterious shouting stranger, who hasn't been spotted since.
Fish 'kills itself' in front of visitors after being blinded by camera flashesIn the meantime, Elsa has been able to see the funny side of the situation and continues to go down to her local lake as normal.
The fisherwoman is encouraging her verbal attacker to 'educate herself', claiming that the sport of fishing isn't harmful to aquatic creatures.
Elsa said: "It's not changed my perspective on fishing.
"I absolutely love the sport, I've always loved the sport, and I think people like herself should be more educated because the fish aren't harmed at all.
"I've always watched videos on Facebook of this sort of thing happening, with people going off day-to-day just doing what they want to do, but I didn't imagine it would ever happen to me.
"I found it funny. I was shocked, but it was so, so funny.
"The power of the media will take control, I'm sure. I don't think she'd want to walk around here again."