The water should be at room temperature.
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.
No, they are the same as most other fancy goldfish having vision in both eyes.
yes, they will eat them and become eye eating menaces. remove the goldfish to a safe location for extraction. Black Bear will meet you soon.
no
What you have is a Telescope Goldfish. the eyes protrude as a product of the cross breeding process
they are black that have long flowing fins and bulging eyes simaliar to a telscopic goldfish the most not be kept with common or comet goldfish they also are visually impared ! overall they are a beautiful and playful breed of cold water fish!!!
They can not. They do not have 'eyelids'.
Goldfish should be fine with other non-agressive coldwater fish. Be wary of fin-nippers as well, especially if your goldfish are the longer-tailed varieties. If you have fancy goldfish, especially the types like telescope eyes with poor vision, be sure your other fish are not so much faster than your fancy that it can't get to the food before it's all gone. Goldfish do not mix well with tropicals as the temperature requirements are too different.
Actually, goldfish do have a stomach, but it's very small, probably about the size of one of their eyes.
yes they can. the black moore goldfish has telescope eyes as well and so they both suffer from limited vision and competition for food is not as one sided.it is not recommended however to put either in the same tank as a regular goldfish, as their eyesight is normal and they swim faster and so eat a larger percentage of food than the telescope or black moore.
Celestial goldfish are well know for the strange eyes. They can only look up for the way their eyes are positioned. The Eyes of a celestial goldfish stick out and point up. It should also be noted that these fish are very fragile and they need much love and care. Make sure their tanks are cleaned properly at least once a month and quickly checked once a week.
They should were dark black.