because they have an instinct to tell them go under the sand or what ever is on the bottom .or to just go deeper under water.
it depends on the fish .
Well let me tell you why they die in pure water. A good explanation is that the water might have bacteria, or position in it. Or the water is not fresh for fishes to swim in or eat nor survive. " "!
Because they will die.
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.
Nothing...they die....
its fins have (special) fairy wings inside
animals surely die by sewage water when dirty water is drank by animals ,they die..fishes living in dirty water can also not survive.the water make it difficult for them to respire.
No it's just the plant organisim dying not the fish
Fishes gills are designed only to extract oxygen when submerged. There is oxygen in water also, but our lungs cannot extract it.
Yes all fishes are cold blooded.
Freshwater (whitewater) fishes include halibut, salmon, and red snappers.
When water freezes especially in arctic and antarctic during winter, the fishes use the oxygen dissolved in the water for respiration and these fishes have anti- freeze in their bodies to prevent ther blood from freezing.