The temperature should be between 23 degrees and 25 degrees celsius.
hot water makes the fishes organs more productive, or faster. That makes the fish energetic
Insects gold fish fishes blood minerals in the water
You can definitely do that, but you haven't made it clear that you have cold water in the tank before. If you can keep the water temperature at 72 F, then you can keep both cold water fishes like gold fishes and non-aggressive community tropical fishes like gouramis, platys, mollies, algae eaters etc with gold fish.
No, but some fishes can feel uncomfortable with water that is too salty, or not salty enough -- too hot, too warm, or too cool.
Yes. Their water needs to be room temperature or lower (75 at most).
No
Freshwater (whitewater) fishes include halibut, salmon, and red snappers.
Thats how they swim
No you retard
They work in schools.
no its orange
Nope