Tail photos attached. Thanks again, Dave. I think it kinda looks like the "ding" you describe.
Yes as I thought your goldfish has what we call a ding in that its hit the tail against an object that has pushed the flesh out on one side of her tail it will get better on its own, the ray is most probably broke but will given time heal .
Carol I know you wish to help timz but please tell me why on earth you think this is a tumour it looks nothing like it
We have over 27 years experiance in fish keeping and yours is please ?
Even if it was a tumour an experianced senior aquarist could quite easily anethatise this fish and remove that section of the tail which would grow back again given time with no harm to the fish, nor more importanly any expensive vets bills.
Carol I dont know how many years you have been fishkeeping but there are very few fish vets in the world they are expensive to use, with the rest of the vets having little or no working knowledge of goldfish or koi especially here in the UK.
So I'm guessingthat its in reality most probably the same in the US and Canada .
In the UK we have a duty of care to our pets minor operations are carried out by experianced fish keepers all around the world ourselves included .
But you need the skills to carry out these proceedures anethetics use, identification of Parasites, pathogens, protozans virus's,etc,
We have to learn how to use a microscope do minor operations and when the time comes euthaizing fish the harmless way with an overdose of anethetics.
It comes with many years of experiance. much reading on the subject , learning from our mentors and practise and that learning is still on going with each new inovation form of new treatment or new medicines.
New books come out periodically and need to be read and assessed then knowledge gained learned
Do you know that a koi well looked after can reach 80+ years or more and a goldfish 40+ years they dont get that old on their own and need a hand every now and again from us the fish keeper "a case in point our two oldest koi have been with us since the start and are now 27+ years old I add the + because you dont exactly know how old they are when you buy them
Dave