Having said that...this is a bit extreme.
Via the Melbourne (Australia) Herald-Sun:
A MELBOURNE vet has performed a delicate surgery on a 10-year-old goldfish, slicing open the beloved pet to remove a growth that was half the size of its head. It's likely George the goldfish has already forgotten the ordeal, but not his relieved owners, Lyn Orton and Pip Joyce, who say they wouldn't hesitate to pay the hundreds of dollars again to save a pet's life.The couple paid about $200 for the 45-minute surgery at Lort Smith Animal Hospital in North Melbourne last week.
Surgery costs $200. How much does a new goldfish cost?