A vet has dramatically saved a family's 17-year-old goldfish after he was struck down by a killer tumour.<br /><br />Vet Emer O’Reilly performed a ‘first of its kind’ operation to remove the growth from the face of beloved fish Merlin.<br /><br />Merlin’s owners became worried about the veteran pet after he was unable to eat and a lump appeared near his left eye.<br /><br />They took the tiny three-inch fish to Linnaeus-owned MyVet in Lucan in Dublin for treatment last month.<br /><br />Merlin was given a general anaesthetic before vet Emer carefully cut out the tumour.