The annual income of five acres of fish ponds may be different according to the specific situation. Here are some possible scenarios:

1. If traditional farming methods are adopted, the annual income of grass carp or carp may be around 30,000 yuan.

2. High-quality fish, such as dragon and tiger spots and groupers, are cultivated by high-tech and high-quality farming methods, and the annual income can reach more than 654.38+10,000 yuan.

3. The annual income may be about 50,000 yuan if a variety of fish are mixed.