Question

why do fishes die in a shallow pond in summer​

Answer 1

So on warm summer nights during algal blooms, the dissolved-oxygen concentration sometimes drops too low for the fish, and a die-off can occur. This can occur as a result of purely natural conditions or because of human activity that results in adding nutrients, nitrogen and phosphorus, to water systems.

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Answer 2

Answer:

fishes die in shallow pond in summer because in summers the water of the pond evaporates leaving the fishes in a situation of drought. Thats why fishes can survive in deep ponds much easily than shallow ponds.