Fish are warm blooded animals. They do not have much of a problem with a small change in temperature. Cold blooded animals such as snakes need to keep warm and can sometimes be seen laying on rocks to collect heat from the sun. Now fish do slow down in water that has a larger drop in temperature. They can almost become dormant, but still need to move and eat but at a much slower rate. Just like any other animal a fish could suffer from hypothermia. if you are talking about pondfish, they will survive if the water is deep enough if it is a small shallow pond it maybe better if the fish would be taken inside. If you are taking tropical fish in an aquarium it is best to keep the temperature as steady as possible. But if that is not possible they still should survive but not for a long long time. It is always best to double check with a trusted store that sells fish.
It drops during hibernation
a layer in a body of water in which water temperature drops with increased depth faster than it does in other layers
Yes. The water is not warm enough to keep the body at a high enough temperature. People begin experiencing hypothermia symptoms when their body temperature drops ~2 degrees F below their average.
Most fish are cold blooded and their body temperature matches that of the water in which the are immersed. However i believe the Great White Shark (and some other predatory fish) can maintain a body temperature higher than that of their environment.
It drops during hibernation
No, when body temperature drops below normal the body will slow down in its functions and go into "preservation mode".
you die
No. Hypothermia is caused when an organism's temperature drops below the temperature required for normal body functions.
four degrees Fahrenheit
Hypothermia is when your core body temperature drops too low to sustain life. It kills you by causing your organs to shut down as you temperature drops. If not reversed in time, you will die.
Yes. Your body has a normal temperature of about 99, so submerging it in water at a temperature less than that will bring your body temp down. Of course it would take longer in 93 degree water than 40 degree water, but it will happen in time.
In hot climate, your body temperature increases easily as there is less water available for perspiration. It is an attempt of the body to conserve the body water, at the expense of body temperature.