Long drift nets hang vertically in the water column and entangle anything that comes into contact with them. The UN has banned nets longer than 2.5 km. Which of the following is not a reason for banning long drift nets?

More than 85% of the world’s species of fish have been pushed beyond their biological limits. Many have been pushed to the point of extinction, or near extinction, by fishing. 70% of the world's fish species are no longer any use to fisheries as their stocks are so low that there are too few of them to be a viable catch.