What are the merits and demerits of fish culture?

(N/A) Merits:
$(i)$ $A$ large quantity of desired fish can be produced in a small area.
$(ii)$ Selective breeding allows for the improvement of fish quality and yield.
Demerits:
$(i)$ Intensive fish farming can pose a threat to local biodiversity if non-native species escape into the wild.
$(ii)$ It often focuses only on economically important and highly valued fish species,potentially neglecting others.