It is more than likely ammonia burn. This occurs by you're ammonia and nitrates being too high, you should probably get a water test kit from you're local pet store!
No, only black goldfish are black.
That is a disease cure it
I would name my black goldfish Fin
no, goldfish are freshwater fish and coral only grows in saltwater, though they do occasionally eat plants
NO! Black Moors are goldfish they should be fed goldfish food.
Some common breeds of goldfish are: the Black Moor goldfish, the Ryunkin goldfish, the comet goldfish, the common goldfish, the Calico Fantail goldfish, the telescope eye goldfish, the bubble eye goldfish, the pearl scale goldfish and the Oranda goldfish.
A tiny fertilised 'ovum' (egg) develops first into an 'embrio'. This develops into a 'wriggler' which then becomes a tiny 'fry'. This grows into a 'goldfish'.
There is a popular bred of goldfish called a black moor. It has an egg shaped body, has protruding globe like eyes and is black in color.
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.
Most goldfish which are purchased with black coloring, except black moors, will usually lose their black coloring at some point in their lives.
Goldfish do not get pregnant. They are egg layers. Black spots on goldfish have nothing to do with their breeding condition.
Nope! Black Moors and other black goldfish get along fine with almost any sort of fancy goldfish.