Local fishermen are prohibited from reaching the ocean by armed guards. People have been killed for walking too close to shrimp farms. The wild seed stock harvest kills five times the non-target species. Water pumped into the pools dries nearby forests while the waste effluent pollutes. Algal blooms thrive on this waste.
Drugs can control disease for about seven years.
Then the pools must be abandoned and the process repeated further down the coast. The wasteland left behind is deficient in soil and too polluted to replant. The companies causing this damage reap enormous short term profit. But local economies are destroyed. The impact of salmon farming is much more subtle, because it occurs underwater, out of sight.