They must be warm blood then if the question gives us only one option...
Warm.
Yes.
cold is better cuz when your in the ocean is the water hot or cold cold
No. They are fish. Mammals are warm blooded.
No they do not. The water lice are parasites and will drink the blood of the goldfish.
Yes, goldfish are cold blooded animals so they do not burn up as much energy as warm blooded animals do to stay warm.
yes, but it may kill the goldfish
it was blood
Warm blood
Goldfish are meant to live in cold water, not the warm water in a tropical aquarium. This is a huge reason why goldfish and tropicals shouldn't be in the same tank.
Warm blooded
you are