artificial breeding

[changeling]

Hi everybody!

Would you mind reading the following sentence? It's about artificial breeding but I'm not sure that I express myself correctly.

It was learned how to farm this best-quality fish long time ago, and artificial breeding is now wide-spread in many countries. This fish is farmed under unique rearing conditions, in tanks exposed to light that imitates a certain season.

Thanks in advance

[Anglika]

It is not well expressed.

How to farm high quality fish was identified a number of years ago, and controlled breeding is now wide-spread in many countries. The fish species are farmed under unique rearing conditions, in tanks exposed to light that imitates a particular season.