Vermin of the Ocean

Fishermen in the NE are complaining of the return of the dogfish, the "vermin of the sea", as the reason their fishing stock is declining. The same dogfish are under federal protection. What is a culture of empire to do? Do you let the fishermen deplete the fish stock or do you let the burgeoning dogfish population devour the few cod and mackerel that are remaining due to the overfishing in the first place? If we had just learned to live within our place in the world we wouldn't have to consider any animal "vermin". Every species would have it's place and we wouldn't have fishing unions or government bureaucracies waging stupid battles that neither really knows how to solve.