marine life.The acoustic deterrent devices (ADDs) also affect dolphins, whales and porpoises with evidence showing it can seriously damage their hearing.Fears have been raised that a new ban on fish farmers killing seals will see a huge increase in the number of companies opting to use the device.The ban legislation was passed in June aligning Scotland with strict US rules meaning farmed fish can still be exported to the lucrative American market.The latest figures show that 142 fish farms in