However , aquaculture , or fish farming , which has been practiced since about 3,500 BCE. in China , is becoming increasingly important in many nations .
Historically and today , most fish protein has come by means of catching wild fish .
Aquaculture , or fish farming , which has been practiced since about 3,500 BCE. in China , is becoming increasingly important in many nations .
Historically and today , most fish protein has come by means of catching wild fish .