Lu Ao turned to look at him in surprise.
Cao Zijun waved a hand. "Marine aquaculture is like that. Since the species are relatively limited and the stocking density is high, they often infect one another with diseases and parasites when they gather together."
Lu Ao thought for a moment. "Don't you often see certain populations gathering on a large scale in the wild too?"
"How could that be the same? In a natural environment, they live or die on their own. As long as it isn't an especially severe large-scale pest outbreak, no one specifically pays attention to a particular school of fish. Aquaculture is different. One small oversight, and you could lose everything you invested for the entire year."
Cao Zijun looked at him. "Brother, I'm not trying to fool you, nor am I worried about you entering this industry as competition. This line of work is genuinely difficult. The technology isn't mature, the procedures are complicated, and the demands on individuals are high. One careless mistake, and you could lose the shirt off your back. If you have any other option, even renting a fish raft to raise fish would be better than throwing yourself into marine ranching."
Lu Ao said sincerely, "Thank you, Brother Cao. I'll consider it carefully."
"I knew you wouldn't really take in anything I said right now, but I still want to advise you. You know about salmon farming, right?"
Lu Ao nodded.
As one of the most commonly used marine fish in sushi, salmon was famous far and wide. Wild catches could not meet demand, so farmed salmon was basically used instead.
Cao Zijun said, "Five years ago, salmon farms in N Country were infected by viruses and parasites. Huge numbers of salmon became covered in parasites and ulcers, and some