There is no correct name. They are all goldfish. Whatever "Fancy Name" you wish to give it is up to you.
Orange black, white orange/red.
They have a variety of colors. From orange, white, black.
Goldfish are a variety of colours from white, black, orange, red, blue-like tinges, and even browns
"Goldfish" colors range from white to yellow-orange to blue to black. White goldfish have no pigment cells.
Goldfish can lose their orange color due to light deficiency or dietary deficiencies. In these cases, the color change is often reversible.
Traditionally the Chinese place eight orange or yellow goldfish and one black goldfish in an aquarium to attract money. The number 8 represents prosperity in Feng Shui. The idea too is that if misfortune hits your family, then the ninth black goldfish will die and receive the misfortune instead of you.
Goldfish come in many different colours. They can be orange, like you normally think of, white, black, blue,silver or any combination.
A bandicoot is a mottled brown colour.The baby mice were mottled brown, white and black.The bruise was mottled with blue and black.
No, only black goldfish are black.
pinechafer
I would name my black goldfish Fin
Yes most goldfish are cross bred and can throw anything from grey to coloured and comets to veiltails and shubunkins. The dark fry you have may well develop colour when they are a couple of inches long so don't be disheartened.