Goldfish have a big red eyes because it could be do to its condition or because it could be getting sick also poor hygiene and no proper care so observe and keep it healthy
Simply a marking on the fish. Do not worry about normal marks.
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.
Goldfish do not have teeth.
Yes. It should be fine. I have 2 regular goldfish living with a bubble eye goldfish and to fancy fantail goldfish, so I think it will be okay.
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.
water
All goldfish are freshwater.
Your goldfish is suffering from exophthalmos also known as pop-eye. Pop-eye can be caused from bacterial infections, tumors, or bad water quality.
A telescope eye goldfish is in the fancy goldfish type, and most fancy golddfish get up to a foot long (with proper care).
No, goldfish should only live with goldfish with a few small exceptions that do not include red ear sliders.
NO.