The female lays eggs, which are fertilized outside the body of the female. Goldfish do not have sexual intercourse.
if your goldfish lives in you then yes
A goldfish with a red head has a distinct coloration that sets it apart from other goldfish. The red head is a unique feature that makes it easily recognizable.
All goldfish are freshwater.
No, goldfish should only live with goldfish with a few small exceptions that do not include red ear sliders.
No. They may leave a red mark if too tight, but not cancer.
Leave that mark to starboard.
it was blood
No, they may leave a red mark but that is only if they are to tight. but it wouldn't give you cancer.
It is most likely that the food you are feeding it with, has red dye in it.
a goldfish
because they are sick dummy
Many colors. I had two male goldfish. One was white and the other one was red.