A vet has reportedly carried out a UK first by removing a tumour from a tiny Molly fish which weighs less than a gram.
The little creature, which looks exactly like a Goldfish, was rushed into the surgery after its owners noticed a lump on its belly.
Staff at Highscoft Rabbit, Small Mammal & Exotic Vets, Bristol, which normally operate on iguanas and snakes, immediately diagnosed a tumour and prepared the fish for surgery.
The emergency procedure saw vets put a catheter in the fishs mouth before giving it anasthetics and removing the mass within 40 minutes.
When the sedation drugs wore off, the fish woke up and returned home later the same day.
Exotic species vet Sonya Miles said: It was definitely the smallest animal weve seen here.
It barely registered on our scales.
Both modern and veterinary medicine has advanced over time so were able to perform.
Its a pretty simple procedure and took no longer than thirty or forty minutes.
We submerged the fish in a container of anaesthetic solution.
Once the righting reflex is lost and the fish is asleep it was the laid on the operating area.