Fishing industry? Optimized? I take it you haven’t heard about bycatch then :)

Massive amounts of creatures that aren’t the target species are still caught (called bycatch) and then thrown back into the water where they typically die. In stuff like shrimp trawling, the world average is 5.7 bycatch : 1 shrimp and can go as high as 20:1!

Not to mention stuff other stuff like ghost nets