I think you're getting a bit confuddled mate. It's farmed tiger prawn that sometimes have one eye removed to increase fecundity in females.

There's one weird treatment that pangasius suffer though: female fish are injected with a solution that contains pregnant human urine, this also has the effect of increasing spawning rates. It does beg the question of how they came to this conclusion and what other methods were tried before deciding that pregnant women's piss was best