People will often fork out for their cats and dogs to have an op, but this is the first time we've heard of a fish getting treatment.
Much-loved George went under the knife after acquiring a brain tumour that was affecting his eating and swimming.
Devoted owner, Pip Joyce, forked out $200 – around £125 – for the tumour to be removed after being told he'd die if not.
Dr Tristan Rich performed the 45-minute-long operation at Lort Smith Animal Hospital in Melbourne.
The 10-year-old pet was sedated in a bucket of water that contained anaesthetic and they also used a gelatin sponge to control bleeding.
Tristan was quoted in the Daily Mirror describing the surgery: "It's a very fiddly procedure and you have to be very careful about blood loss."
Pip said: "We love George. He's been great company and we've had some good laughs out of him."
Dr Rich believes George could live up to another 20 years – what a flipping good ending!
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