What are the two disadvantages of composite fish culture?

It's tricky to say there are just two disadvantages of composite fish culture, as the drawbacks can be more nuanced and depend on specific scenarios. However, here are two key disadvantages often cited:

1. Increased Risk of Disease Outbreaks: Mixing different fish species in a single pond increases the chances of disease transmission. Species have different vulnerabilities and can carry pathogens that may not affect them but can be harmful to others. This can lead to rapid disease outbreaks and significant losses.

2. Competition for Resources: Different fish species have different dietary needs and feeding habits. In a composite system, competition for food, space, and other resources can arise. This can lead to slower growth rates and reduced overall productivity if the balance of species is not carefully managed.

Let me know if you want to explore other potential downsides of composite fish culture!