Cool fronts, cloudy weather, muddy water, herbicides or nutrient depletion can cause a die-off, creating a large oxygen demand to decompose the plants. This demand can be higher than the system can support, leading to a fish kill.

What causes catfish fingerlings to die?

Overfeeding fingerlings and juveniles may also lead to high mortality rates because they have uncontrollable appetite which lead to overfeeding and consequently death.

What would causes catfish to die?

Prolonged cloudy weather, drought conditions, overcrowded fish populations, excessive algal or other plant growths, and high water temperatures are the most common factors that combine to cause fish kills.