I believe you mean the fishes mucoprotective slime coat. It is there to protect the fish from things (bugs/chemicals/etc etc) in the water that may damage it.
"Mucis" is not a word. Did you mean "music" or "mucous"?
I would expect them to have no effect on Goldfish whatsoever.
no
no
yes
The size of a goldfish tank can affect the growth of the goldfish. A larger tank provides more space for the goldfish to swim and grow, leading to healthier and potentially larger fish. In contrast, a smaller tank can restrict the fish's movement and growth, potentially stunting their development.
yes, it will
mucis
Different types of goldfish food typically don't affect the colour of goldfish, however there are some specific goldfish foods that may enhance the color of goldfish- but do not change its overall color.
The size of a tank can affect the growth of goldfish. A larger tank provides more space for the goldfish to swim and grow, allowing them to reach their full potential size. In a smaller tank, goldfish may be stunted in growth due to limited space and water quality issues.
Yes, pH levels can affect goldfish growth. Goldfish tend to prefer a pH level between 6.5 and 8.0 for optimal growth. Fluctuations in pH levels outside this range can stress the fish and potentially stunt their growth. It is important to maintain stable and suitable pH levels in the aquarium to promote healthy growth in goldfish.
It depends on the conditions. If all the goldfish were being starved (for example) most of them WOULD die. But if one just happened to die for no particular reason, then it probably won't affect the rest.