No, only black goldfish are black.
Goldfish are not asexual. There are male and female Goldfish and both are needed for ova release (from the female) and milt release (from the male), thus allowing fertilisation to take place.
There is no difference
Some goldfish are male, while others are female.
Female goldfish are usually bigger than male goldfish.
Usually a female goldfish mates with a male goldfish!
goldfish start out with female and then turn into male!!!!!!
Fancy goldfish can be male or female.
Well yes you need a male goldfish and a female goldfish to have babies but it takes allot of time to breed them.
You should not put a male betta with goldfish's.They are aggressive and will fight with goldfish's goldfish give off ammonia and will kill the Betta's.
Many colors. I had two male goldfish. One was white and the other one was red.
When in breeding condition the male goldfish has white spots on his gill plates. The rest of the year he looks exactly the same as a female.
I would name my black goldfish Fin