Mr Bender said a study of previous fish escapes indicated the escapees would not impact native marine fauna.
“Farmed salmon generally don’t appear to feed on native species as they are typically used to feeding on fish pellets,” he said.
Mr Bender said the future was bleak for the fugitive fish.
He said the “calm weather” had enabled crews to “thoroughly search the surrounding area including shorelines to retrieve any pen components that had come adrift during the fire”.
The loss was calculated by counting the remaining fish at Huon Aquaculture’s Zuidpool lease.
Marine and Safety Tasmania, the Environment Protection Authority and Tasmania’s Department of Primary Industries, Water and the Environment have been notified.
Salmon have previously escaped en masse from enclosures around Tasmanian waterways, leading to fishers reaping a bounty, if they can be caught — as farmed fish are unused to pursuing bait.
Tasmania Police said they were not investigating the fire.