Carr said while that seems like a small amount, it generally indicates otherwise. "Under one per cent of those that escape from net pens actually make it to rivers. So this escape could've been in the thousands, or even 10- to 20,000, we just don't know," he said. Nell Halse with Cooke Aquaculture said divers have been double-checking company pens, but the fish don't appear to have come from their farms. She said her company has a vested interest in not letting fish escape. "We don't want to lose our inventory, like any farmer would," said Halse.