* Water Temperature: Fish are cold-blooded (ectothermic), meaning their body temperature is regulated by their surroundings. Different fish species have different temperature tolerances. Temperature changes can affect their metabolism, growth, reproduction, and even survival.
* Water Quality: The quality of the water is crucial for fish health. Factors like dissolved oxygen levels, pH, salinity, and the presence of pollutants can all significantly impact fish populations. For example, low dissolved oxygen levels can suffocate fish, while high levels of pollutants can cause disease or death.
Let me know if you'd like to explore any of these factors in more detail!