Question

what is mass mortality in fish pond

Answer 1

The mass mortality of fishes in a pond is a result of eutrophication. Eutrophication is a process by which plant growth increases in a water body like ponds or lakes. The increased growth and overcrowding of plants is due to either natural fertilising agents that are washed off from the soil or the runoff of chemical fertilisers applied to agricultural lands. As the overcrowd plants die off, the dead and decaying vegetation depletes the pond’s oxygen supply. This in turn leads to the mass scale death of fish in the pond.

:-):-)

Answer 2

As the overcrowd plants die off, the dead and decaying vegetation depletes the pond's oxygen supply. This in turn leads to the mass scale mortality of fish in the pond.