In February, when the virus was first suspected, the company voluntarily destroyed two cages of salmon at its Shelburne facility.

The CFIA ordered the destruction of a third pen of fish after tests confirmed the virus. Last month, the agency said even more salmon would have to be killed.

Dozens of community, angling and tourism groups have called for a moratorium on fish farms.

The Nova Scotia government has shot that down, saying it believes that the industry is good for the province.