Why fish is not survive in warm water, but survive in cold water

1.	Why fish is not survive in warm water, but survive in cold water
Answer» Many, but not all, fish kills in the summer result from low concentrations of\xa0dissolved oxygen\xa0in the water. Fish, like all other complex life forms, need oxygen to survive. They get theirs in the form of oxygen gas dissolved in the water. That\'s why it\'s important to have an aeration device, a bubbler, in your home aquarium.Warm water holds less dissolved oxygen than cold water, so summer is the time when fish can have a hard time getting enough oxygen. Other organisms use oxygen, too, including the algae that grow in the summer and bacteria that degrade organic matter. During the day, the algae produce oxygen through photosynthesis, but at night, when photosynthesis stops, they and other organisms keep respiring, using up oxygen.

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